CHEMISTRY HIGH SCHOOL

Particles in an object are constantly moving. the particles also attract and repel each other. this attraction and movement can be classified as _________.A. Specific heat
B.heat
C.temperature
D. thermal energy

Answers

Answer 1
Answer:

Answer:

Thermal energy.

Explanation:

Thermal energy is related to heat of the system, so higher the heat in the system more the thermal energy and this will cause more movement. In case of less thermal energy, less movement and hence more attractions.

A) specific heat : it is the heat required to raise the temperature of one unit of a substance by one degree.

B) Heat is not a property of system. It is given and taken out from the system which changes its temperature and thermal energy.

C) Temperature is measurement of heat.
Answer 2
Answer: Particles in an object are constantly moving. The particles also attract and repel each other. this attraction and movement can be classified as D.Thermal Energy

Thermal energy is energy that comes from heat, it's part of energy of total energy of any object.

Hope this helps :)

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What is the difference between periods and groups on the periodic table?

Answers

Periods are rows horizontally along the periodic table whereas groups are vertical columns down the periodic table.
Elements in the same group react similarly. E.g. the group 1 metals (found in the first column of the periodic table) react readily with air and water (this is the similarity) but these reactions become more vigorous / explosive as you go down the group (this is why they are similar but not the same). This is because elements in the same group have the same number of electrons in their outermost energy level (and electrons are responsible for how an element reacts)
Elements in the same period of the periodic table have the same number of inner most (also known as 'main') energy levels so have the same amount of electron shielding.

What is the correct molar mass for the compound CaBr3

Answers

CaBr₃ = 40 + 80 * 3 = 280 g/mol

hope this helps!

A beaker with water and the surrounding air are all at 24°C. After ice cubes are placed in the water, heat is transferred from:(1) the ice cubes to the air
(2) the beaker to the air
(3) the water to the ice cubes
(4) the water to the beaker

Answers

The answer is (3) the water to ice cubes.

As the ice cubes should be at a temperature of about 0 degree ( freezing point) , at the same time the temperature of water is 24 degree. Thus, heat is transferred from water to ice cubes.
(3) the water to the ice cubes
  This is so because the ice cubes are colder compared to their surrounding objects.
They absorb the heat from the water, cooling it, therefore vanishing(melting).

The half-life of fluorine-20 is 11.4 seconds. After _______ seconds, 1/4 of the original amount of fluorine-20 will remain

Answers

Answer:

The answer is 22.8

Explanation:

Just took the quiz on APEX :)

Atoms of which types of elements tend to gain electrons? Atoms of which types of elements tend to lose electrons?

Answers

Atoms of elements that are nonmetals tend to gain electrons and atoms of metallic elements tend to lose electrons. Metals have few electrons in their valence shells.By losing those electrons, these metals achieve noble gas configuration and satisfy the octet rule.Nonmetals that have close to 8 electrons in their valence shells readily accept electrons to achieve noble gas configuration.An example is the reaction between calcium and oxygen. Calcium is a metal and has 2 valence electrons. Oxygen is a nonmetal and has 6 valence electrons.Calcium gives up its two valence electrons and oxygen accepts them and an ionic bond is established resulting in the formation of anew compound namely calcium oxide.

Final answer:

Nonmetals, such as those in groups 14 and 17, generally gain electrons becoming more stable anions. Metals, like those in group 1, typically lose electrons and form stable cations. An example is in ionic compounds where metal atoms like sodium lose electrons and nonmetal atoms like chlorine gain electrons.

Explanation:

In the context of elements and their atoms, nonmetals, which include elements from group 14 and group 17, tend to gain electrons. This gain in electrons forms negative ions, or anions, which fills their outermost electron shell, making them energetically more stable.

On the other hand, metals like those from group 1, tend to lose electrons. This event makes them energetically more stable by forming positive ions, or cations, and allowing them to achieve an electron configuration similar to noble gases.

For instance, to fill their outermost shells, elements donate or accept electrons. In ionic compound formation, metals like sodium (Na) lose electrons while nonmetals like chlorine (Cl) gain these electrons, achieving a stable configuration.

Learn more about Electron Transfer in Atoms here:

brainly.com/question/33452670

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Why check dams can increase the groundwaater level in a region

Answers


Check dams shouldn't be more than 2-3 feet high. The center of it should be at least six inches lower than the edges. They might kill grass linings in channels if water stays high or sediment load is great. That criteria induces a weir effect, which makes water surface levels go upstream for some, if not all flow conditions.
Hope this helps! :)
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