Neutrons have a what kind of charge?
Neutral
Which of the following are the most reactive of all metals?
Alkali metals
Which statement provides the best description of a covalent bond?
A covalent bond is the attraction between atoms when they share electrons
Which force holds protons and neutrons together in the atom nucleus?
Strong nuclear force
Which best represents nuclear fission?
G
The number of which type of particle determines the identity of an element?
Protons
What describes the Group 2 elements beryllium, magnesium, and calcium?
Alkaline metals
How many particles are in one mole of a substance?
6.02 x 10^23
What type of nuclear decay is represented in this illustration?
Alpha decay
A high temperature is required for which to occur?
Nuclear fusion
Protons have a what kind of charge?
Positive
To which major group do these elements belong?
Transition metals
PbI with exponent 2
Which of these is an alpha particle?
D
During nuclear fission, a nucleus _________.
Divides
Electrons have ______ charge.
Negative
The illustration shows the upper right section of the periodic table. How are the elements in the lightly shaded region to the right classified?
Non-metals
Which of the following is not an ionic compound?
HCI
When a neutron turns into a proton in a nucleus, what sort of particle is emitted?
Beta
Only nuclei with _________ atomic numbers can undergo fission.
Large
______ are atoms of the same element that have different numbers of neutrons.
Isotopes
Which group of elements on the periodic table is the least reactive?
Group 18
The substances that undergo change in a chemical reaction are called
Reactants
What happens in a nucleus during gamma decay?
The number of protons remains the same.
When two smaller nuclei come together, it is called ________.
Nuclear fusion