Review of Basic Chemistry for Biology

What charge do electrons have?

• positive
• negative
• neutral

Tags

NGSS.HS-PS2-4

The atomic number of an elements is the total number of which particles in the nucleus?

• neutrons
• protons
• electrons
• protons and electrons

Subatomic particle that determines the identity of the atom

• proton
• nucleus
• electron
• neutron

The __________________ is the sum of the protons and the neutrons in an atom.

• Atomic Number
• Mass Number
• Protons
• Neutrons

A covalent bond forms when 

• Valence electrons are shared
• a sea of mobile electrons surround the cations
• valence electrons are shared between atoms
• none of the above

Particles in an atom that are neutral and have no charge are 

• negatrons 
• electrons 
• neutrons 
• protons 

If the number of protons equal the number of _____, the atom will have no charge

• protons
• neutrons
• electrons
• nucleus

What is the mass number?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

Tags

NGSS.HS-PS1-8

Ions are: 

• atoms with a positive or negative charge
• atoms with no charge
• atoms with ONLY a positive charge
• atoms with ONLY a negative charge

What are the building blocks of MATTER?

• Atoms
• Cells
• Protons
• Neutrons

Tags

NGSS.MS-PS1-1