Review of Basic Chemistry

The image shows the periodic grid for POTASSIUM. How many ELECTRONS are found in a potassium atom?

• 19
• 39
• 20
• Impossible to tell

Tags

NGSS.HS-PS1-1

The image shows the periodic grid for POTASSIUM. What is Potassium's atomic mass?

• 19
• 39
• 20
• Impossible to tell

The image shows the periodic grid for POTASSIUM. How many PROTONS are found in a potassium atom?

• 19
• 39
• 20
• Impossible to tell

What does the ATOMIC MASS tell us about an atom?

• Protons + Neutrons
• Protons + Electrons
• Neutrons + Electrons

What type of chemical bond is formed between two atoms when electrons are shared?

• ionic

• covalent

• hydrogen

• spontaneous

Which of the follow is NOT one of the 6 most common elements found in living things?

• C

• N

• Fe

• O

• P

What type of bond is formed between an atom that has lost an electron and an atom that has gained an electron?

• covalent

• hydrogen

• van der Waal

• ionic

Tags

NGSS.HS-PS1-3

What is the number of valence electrons (the electrons on the outer-most shell) for Oxygen?

• 8

• 6

• 2

• 1

Tags

NGSS.HS-PS1-1

Which notations represent different isotopes of the element sodium?

• ³²S and ³⁴S
• S^2- and S⁶⁺
• Na⁺ and Na⁰
• ²²Na and ²³Na

A positively or negatively charged atom.

• covalent bond

• compound

• ion

• chemical bond