Introduction to Chemistry

How many protons does Na have?

Mathematical Equivalence

ON

Tags

NGSS.MS-PS1-1

How many electrons does a sodium atom have?

Mathematical Equivalence

ON

How many neutrons does Na have?

Mathematical Equivalence

ON

How many electrons does F^- have?

Mathematical Equivalence

OFF

Tags

NGSS.MS-PS1-1

How many electrons does magnesium ion have?

Mathematical Equivalence

OFF

How can atoms acquire a valence energy level that is full?

• By gaining protons

• By losing neutrons

• By transferring their electrons

• By sharing their electrons

When do ionic compounds form?

• When a nonmetal transfers its electrons to a metal.

• When a metal transfers its electrons to a nonmetal.

• When two metals share electrons.

• When two nonmetals share electrons.

What is a molecular compound?

• A compound composed of two or more nonmetals held together by covalent bonds.

• A compound composed of metals and nonmetals.

• A compound composed of only metals.

• A compound composed of only noble gases.

Tags

NGSS.MS-PS1-1

Which of the following elements form diatomic molecules?

• Oxygen, Nitrogen, Fluorine

• Carbon, Helium, Neon

• Sodium, Potassium, Calcium

• Iron, Copper, Zinc

Draw the Bohr diagram of a carbon atom.

Tags

NGSS.MS-PS1-1