TEST - Ch 2 The Chemistry of Life

What is the basic unit of matter?

• atoms
• molecules
• compounds
• none of these

Which atomic particle has a positive charge?

• proton
• neutron
• electron
• valence

Which atomic particle has a negative charge?

• proton
• neutron
• electron
• valence

Which atomic particle has no charge?

• proton
• neutron
• electron
• valence

What happens to positive and negative particles?

• attract
• repel

Atoms usually have the same number of protons and electrons, therefore they are

• positive
• negative
• neutral
• none of these

What is an atom that has more neutrons than protons and electrons?

• ion
• isotope
• valence
• none of these

What are the valence electrons?

• the electrons on the innermost orbital
• the electrons on the outermost orbital
• the protons on the outermost orbital
• none of these

How many e- must there be in the first orbital for it to be “full”, and how many e- must there be in all other orbitals for it to be “full”?

• 2; 12
• 2; 10
• 2; 8
• 8; 8

What does the atomic number indicate?

• the mass of the atom
• the charge of the atom
• the number of neutrons
• the number of protons and electrons