CHANGES IN MATTER
Select the correct term to complete the
sentences.
ion
chemical reaction
chain reaction
activation energy
exothermic
covalent
half-life
beta decay
endothermic
reactant
ionic
nuclear reaction
alpha decay
gamma decay
product
1.
Electrons in a(n) ____ bond are transferred from one atom to another.
2.
Electrons in a(n) ____ bond are shared between atoms.
3.
An atom that loses or gains an electron is called a(n) ____.
4.
Mixing baking soda and vinegar is an example of a(n) ____.
5.
A chemical reaction that gets hot is ____.
6.
In a chemical reaction, you start with ____ that are combined to make
____.
7.
A chemical reaction that gets colder is ____.
8.
To make water from hydrogen and oxygen, a spark provides the ____
needed
to make the reaction happen.
9.
____ can change one element into another element.
10.
A(n) ____ occurs when the fission of one nucleus triggers the fission
of
many other nuclei.
11.
In ____ an atomic nucleus ejects two protons and two neutrons.
12.
In ____ a neutron in a nucleus splits into a proton and an electron.
13.
In ____ the nucleus of an atom emits a high-energy photon but the
number
of protons and neutrons stays the same.
