atomic structure
Which subatomic particle has a positive charge and is found in the nucleus of an atom?
Proton
How many electrons can fit into the very first ring around an atom?
2
If an uncharged atom has an atomic number of 11 and a mass number of 23, how many neutrons does it have inside its nucleus?
12
When an electron absorbs energy and jumps to a higher energy level, what state is the atom in?
Excited state
Which type of chemical bond forms when two atoms share a pair of valence electrons?
Covalent bond