Matter and Energy Review

Matter and Energy Review

How do I calculate the # of neutrons of an element?

Round & Subtract

Multiple Choice

A neutral atom of Phosphorus has 15 protons and 15 electrons. If it's mass number is 31, how many neutrons does an atom of Phosphorus have?

• 15

• 16

• 30

• 61

Multiple Choice

A neutral atom of Fluorine has 9 protons and 9 electrons. If it's mass number is 19, how many neutrons does an atom of Fluorine have?

• 9

• 18

• 10

• 37

Multiple Choice

A neutral atom of Nitrogen has 7 protons and 7 electrons. If it's mass number is 14, how many neutrons does an atom of Nitrogen have?

• 7

• 14

• 21

What element is this?

• Count the # of Protons!

• Positive = Proton

• PRIDE "Protons Identify Element"

• Atomic Number = Protons

• Look at the Periodic Table

Multiple Choice

Based on the atom's diagram, identify the element.

• Oxygen

• Fluorine

• Carbon

• Hydrogen

Multiple Choice

Based on the atom's diagram, identify the element?

• Hydrogen

• Neon

• Lithium

• Helium

Multiple Choice

Based on the atom's diagram, identify the element?

• Neon

• Hydrogen

• Carbon

• Fluorine

Elements position on the Periodic Table depends on it's Physical and Chemical Properties.

Multiple Choice

Which element fits the description? It is highly reactive because it has 1 valence electron. It is in group 1 and in period 2.

• Hydrogen

• Lithium

• Sodium

Multiple Choice

Which element fits the description? It is non-reactive because it has full outer shell of electrons. It is in group 18 and period 3

• Helium

• Neon

• Argon

Multiple Choice

Which element fits the description? It is highly reactive because it has 7 valence electrons. It is in group 17 and period 2

• Fluorine

• Chlorine

• Argon

Multiple Choice

Metals are represented by the color?

• yellow

• green

• blue

Multiple Choice

Nonmetals are represented by the color?

• yellow

• green

• blue

Multiple Choice

Metalloids are represented by the color?

• yellow

• green

• blue