Chem Review

What is the chemical symbol of Flourine?

• C

• Mg

• Fe

• F

What is the chemical symbol of Tungsten?

• Ca

• W

• Zr

• Ti

How many protons are in Potassium?

• 19

• 73

• 30

• 39

Which identifier indicates the number of protons and electrons in an atom?

• Atomic mass

• Atomic number

• Chemical symbol

• Periodic column

What is the equation to find the total number of neutrons in an atom?

• Atomic mass- Atomic number

• Atomic number - atomic mass

• Atomic Mass- Chemical Symbol

• Atomic Number- electrons

Calculate the number of neutrons in phosphorus

• 13

• 15

• 16

• 12

Answer explanation

31 (Atomic Mass rounded up) - 15 = 16

Calculate the number of neutrons in Gold

• 117

• 110

• 120

• 118

Answer explanation

197-79 = 118

What are the reactants in the following chemical reaction? (Mark all that is correct)

Al + O2 -> Al2O3

• Al

• O

• Not in the equation

• Al2O3

What would be the coefficient of NaBr in a balanced chemical equation?

NaBr + Cl2 -> NaCl + Br2

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5