Other planets have an atmosphere, but Earth's is unique because it has large amounts of oxygen.
Answer:
in the nucleus of an atom
Explanation:
Answer: The given statement is true.
Explanation:
A chemical change is a change that causes change in chemical composition of a substance.
This change is due to the exchange of electrons that lead to the formation or breaking of bonds.
For example, sodium atom on donating an electron to chlorine atom forms an ionic bond due to transfer of electron.
This formation of ionic bond leads to the formation of a new compound named as sodium chloride.
Therefore, we can conclude that the statement a chemical change involves the formation or the breaking of bonds, is true.
Chemical change involves the formation or breaking of bonds, leading to the formation of new substances.
A chemical change involves the formation or breaking of bonds. When a chemical change occurs, the atoms rearrange themselves, leading to the formation of new substances with different properties. This is different from a physical change, where no new substances are formed.
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b) Fe₂(SO₄)₃
c) Fe₂(SO₃)₃
d) Fe₂SO₄
e) Fe₂SO₃
(2) The atom absorbs energy, and one or more electrons move to a lower electron shell.
(3) The atom releases energy, and one or more electrons move to a higher electron shell.
(4) The atom releases energy, and one or more electrons move to a lower electron shell.
1) The atom absorbs energy, and one or more electrons move to a higher electron shell.
So all the statements except 1) are false.
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It can be reshaped by a force.
It ignites at high temperatures.
It can combine with oxygen.
Answer is: It can be reshaped by a force.
Physical property can be observed and measured without any changes in molecular composition. The same substance is present before and after the change, changing the shape is physical change.
Copper reaction with acid, ignition and combination with oxygen are chemical change (chemical reaction), because new substances are formed, the atoms are rearranged and the reaction is followed by an energy change.