Chapter 1: Atoms and Molecules Quiz
Atom X has an atomic number of 19 and has a mass number of 39. The number of protons in atom X is equal to
19
Magnesium has 12 protons. How many electrons are in its third energy level?
2
When the outermost electrons are transferred or shared between atoms,
Chemical bonding occurs.
A(n) __________ is formed when two atoms share electrons.
Covalent bond
Radioactive isotopes have
Excess neutrons.
This attractive force, referred to as a type of chemical bond, contributes to the shape of large molecules.
Hydrogen
The atoms of the isotopes of a particular element vary in the number of:
Neutrons
Ninety-six percent of the weight of the body results from all of the following elements EXCEPT:
Potassium
A nonpolar covalent bond implies that ________.
There is no difference in charge at the ends (the two poles) of the bond
An atom that has gained or lost electrons is called an ion.
True