Answer:
D
B
B not sure sorry
C
Compound
A. On the Periodic Table of Elements, columns are called ______________________; all of these
elements
have the same number of ___________________________.
B. On the Periodic Table of Elements, rows are called _____________________; all of these have the same
number of __________________________.
On the Periodic Table of Elements, columns are called groups ,all of these elements have same number of valence electrons and the rows are called periods and have same number of valence shells.
Periodic table is a tabular arrangement of elements in the form of a table. In the periodic table, elements are arranged according to the modern periodic law which states that the properties of elements are a periodic function of their atomic numbers.
It is called as periodic because properties repeat after regular intervals of atomic numbers . It is a tabular arrangement consisting of seven horizontal rows called periods and eighteen vertical columns called groups.
Elements present in the same group have same number of valence electrons and hence have similar properties while elements present in the same period show gradual variation in properties due to addition of one electron for each successive element in a period.
Thus, columns are called groups ,all of these elements have same number of valence electrons and the rows are called periods and have same number of valence shells.
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What happens to a wooden log when it is burned?
A.It is completely destroyed.
B.It is completely changed into heat energy.
C.It changes into other types of matter and energy.
D.It physically changes into the gaseous phase.
Answer:
I would say c.
Explanation:
It is transformed into new energy
If it rained, what would be the deepest layer the water would go through?
Answer:
soil
Explanation:
Buying fruit and vegetables needs to be done more often as these types of foods can quickly go rotten. What could you do to slow down the chemical change of fruits and vegetables rotting? Give a reason to support your answer.
Answer:
putting them in the fredge while in a plastic container
Explanation:
my reason is the cools down / kinda freeze the chemicals so it slows down
Fossil fuels are commonly used as a source of energy because _____.
fossil fuels are most readily available.
fossil fuels are a renewable resource.
fossil fuels are best for the environment.
fossil fuels are cost-effective.
Answer:
fossil fuels are cost-effective.
Answer:Fossil fuels are most readily available and fossil fuels are cost-effective.
Explanation:i got this right on my class have a great day!!!=D
What do I do when I have A test on Measuring and Density
How do I measure the length?
In which of the following examples would you see a chemical change occur?
A. Candle wax melting
B. Lighting a match
C. Salt dissolving in water
D. Water freezing
Answer: i’m pretty sure it’s B
Explanation:
Which phrase provides the best definition of a landform region?
A a large area where the topography contains the three main landforms
B the border where two different landforms meet
a large area where the topography is made up of one landform
C a large area where the topography is inconsistent and contains multiple landforms
Answer:
a large area where the topography is made up of one landform.
What are characteristics of metals? What is the only metal that is a liquid at room temperature?
Answer:
mercury turns into liquid at room temperature! :D
which of these atoms are electrically neutral?
Atoms are electrically neutral because they contain equal quantities of positively charged protons and negatively charged electrons. Electrons and protons have equal but opposite charges, so the result is no net charge. Ions are atoms that have gained or lost electrons.
Answer:
the blue
Explanation:
if an atom contains equal numbers of protons and electrons, the atom is described as being electrically neutral.
current flows between the reigons of opposite electrical charge, forming a _________.
Answer:
Lightening bolt
Explanation:
If you weighed the atoms that appear on the reactant side of the equation, would they have the same mass as the atoms that appear on the product side? for N2 + H2 -> NH3
Answer:
No
Explanation:
If you added the reactants on the reactant side because there is one atom for nitrogen on the product side while there is two atoms on the product side. There are more hydrogen products on the reactant side as well.
Hello brainly user can you help me out thanks!
list the following items from smallest to largest
Grain of salt
E. coli bacteria
human
water molecule
skin cell
Water Molecule
Hemoglobin
Influenza Virus
Skin Cell
Grain of Salt Hope this helps!
Does stirring a liquid make it cool down faster?
Answer:
Stirring will help cool a hot drink because it speeds up the process of convection by bringing the hottest liquid at the bottom to the top
Explanation:
Answer: No not really, all your doing is moving it around
Explanation:
I tested it
A student looking for an element that will bond with sodium (Na) knows that table salt is a compound of sodium and chlorine (Cl). Based on this information, which of the following elements would MOST likely bond with sodium?
A.argon (Ar)
B.bromine (Br)
C.calcium (Ca)
D.potassium (K)
According to the concept of electronic configuration and valency sodium is most likely to bond bromine.
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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please answer this question quickly
Answer:
The right would be rusting. not sure what the left would be
Explanation:
can someone please help me ill mark brainliest and lots of points please help me someone that likes helping people please help mee thank you
Answer:
1) B and 2) D
Explanation:
when scientists refer to the naked eye, it is referring to the eye without any sort of magnifying device, such as a microscope. Algae blooms can result naturally or by human interference
An image of a cue ball striking the surface of a pool table is shown. All of the following describe the acceleration of the cue ball EXCEPT-
A. the ball changed direction when it hit the side of the table.
B. the ball traveled at 30 cm/s while it was moving.
C. the ball was at rest until it was struck by the pool cue.
D. the ball eventually came to a stop due to friction.
The acceleration of the cue ball is not described by the ball traveling at 30 cm/s while it was moving. Therefore, option (B) is correct.
What is acceleration?Acceleration can be described as the change of velocity of an object with respect to time. The acceleration is a vector quantity as it possesses both magnitude and direction. Acceleration is calculated as the second derivative of position w.r.t. time as well as the first derivative of velocity of an object w.r.t. time.
The force is the product of the mass and acceleration of an object according to Newton's second law of motion,
F = ma
And, a = F/m
Therefore, the acceleration of a moving object is inversely proportional to its mass.
As the cue ball hit the pool table its direction changed so it defines acceleration as acceleration is a vector quantity. The cue ball eventually stops due to friction.
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Why were the iron fillings in a water a suspension?
electrons are one of the ________, or pieces, that make up an atom
Answer:
Components
Explanation:
Wish it helps
In the 1700s, Isaac Newton determined that the force of gravity between two objects depends on the mass of the objects and distance between them. He reasoned that things fall toward Earth because it has so much mass. Then in the 1900s, Albert Einstein worked with new discoveries, such as the fact that light always travels the same speed, and he determined a new explanation of how and why gravity works. Mass and distance still matter in Einstein’s explanation, but speed also matters. Newton’s explanation still works for objects close to Earth, but Einstein’s explanation works for all of the objects in the universe.
In recording data, it is important to use the proper unit. Which unit is used to measure how warm or cool the air is?
liters (L)
grams (g)
millimeters (mm)
degrees Celsius (°C)
Answer:
Degrees Celsius (°C)
Explanation:
Liters is for liquid, grams is for mass, and millimeters is for length
Answer:
Degrees Celsius
Explanation:
Liters (L) measure volume, grams (g) measure mass, and millimeters (mm) measure length. Degrees Celsius measures temperature, which is how warm or cool the air is.
All the balls described below are the same size. Which of the balls has the highest density?
A. a ball filled with plastic
B. a ball filled with feathers
C. a ball filled with air
D. a ball filled with solid metal
1) a cold air mass and meets warm air mass. what will happen, in terms of the difference in their densities?
2) archie needs to find the density of an intricately crafted crown, to see if it is pure gold. he has no trouble measuring mass, but he doesnt know what to do next. what should he do?
I NEED HELP PLEASEEE
Which of the following happens to a material when it goes through a chemical change?
A The substance changes size.
B The substance changes state.
C The substance changes shape.
B The substance changes into a new substance.
The following happens to a material when it goes through a chemical change is the substance changes into a new substance. Thus option D is correct.
What is chemical change?Chemical change is defined as a change of materials into another, new materials with different properties and one or more than one new substance are formed.
Physical change is defined as a type of change in which the form of matter is altered but one substance is not transformed to another substance i.e. new substance is not formed.
Thus, the following happens to a material when it goes through a chemical change is the substance changes into a new substance. Thus option D is correct.
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Which statement best describes gravity? (3 points)
a. It is the force that repels only very small objects.
b. It is the force that acts between objects with zero mass.
c. It is the force that sometimes acts only on very large objects.
d. It is the force that acts between any two objects in the universe.
Answer:
option d
Explanation:
have a nice day
Jamie completes the following steps in an experiment to investigate how temperature affects how fast something will rust in water. He places a nail in a bowl of water in the sun and a nail in a bowl of water in the shade. He also leaves an iron nail out of the water in a dry bag out of the sun. Why would Jamie leave one out of the water and out of the sun?
A Jamie also wants to test if the water affects how fast the iron nail will rust.
B Jamie notices that the size of the nail is different, so he does not want to use it later.
C Jamie doing all these steps to create a control group to compare his results to.
D Jamie puts the nail in a cooler place to see if it will rust as fast as the other items.
Jamie notices that the size of the nail is different, so he does not want to use it later. Thus option B is correct.
What is rusting?Rusting is defined as a rust, a combination of iron oxides, forming on the surface of iron objects or structures.
It can also be defined as a typically reddish-brown oxide generated by the catalytic interaction of iron and oxygen in the presence of water or air moisture.
Rusting is an oxidation reaction.
Oxidation is defined as a type of reaction in which the loss of electrons or the increase in the oxidation state of a molecule or its constituent atoms.
It can also be defined as a process in which atoms or groups of atoms lose electrons.
Thus, Jamie notices that the size of the nail is different, so he does not want to use it later. Thus option B is correct.
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What is the definition of the particle?
A particle is a small piece of anything. If you mean a subatomic particle, that's a body that you can't see because it is so incredibly small, though it does have a miniscule mass and internal structure. These particles are even smaller than atoms. You can also say a crumb or speck of something is a particle.
please help!!!!!!!!!!!!!!!!!!!!!1
Steve fills a jar with water and adds Epsom salts and ammonia. After five minutes, he observes that white particles have formed and settled at the bottom of the jar. Steve is unable to change these particles back to any of the three original substances by heating or stirring the solution. He isolates the white particles and finds that they have properties that are very different from any of the three starting materials. Which statement BEST explains Steve's observation?
Group of answer choices
A physical change occurred because no color change was observed.
A chemical change occurred because a new substance formed.
A physical change occurred because stirring did not change the solution.
A chemical change occurred because a solid substance formed.
10 points Explain the Lunar Eclipse in 4-5 (PLEASE DON'T LOOK IT UP THAT'S PLAGIARIZING
Answer:
use code sypherpk
Explanation: