Chemistry Quiz

Which category of elements have the property of being malleable and ductile?

• metals

• nonmetals

• metalloids

• gases

Which of these elements has 5 valence electrons?

• Arsenic (As)

• Boron (B)

• Rubidium (Rb)

• Vanadium (V)

Tags

NGSS.HS-PS1-1

Which element is the most metallic in the periodic table above?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-1

Which has a charge of +1?

• proton

• atom

• neutron

• electron

A 25.0-gram sample of magnesium oxide contains 10.8 grams of magnesium. What is the percent of oxygen by mass in this compound?

• 14.2 %

• 56.8 %

• 89.2 %

• 43.2 %

Tags

NGSS.HS-PS1-7

A compound has the formula X₃Y. For every 15 X atoms present in this compound, how many Y atoms are there?

• 15

• 3

• 45

• 5

Tags

NGSS.MS-PS1-1

Which region contains the alkaline earth metal family of elements, in the periodic table above?

• A

• B

• C

• D

How many total atoms are in 3Na₂SO₄?

• 24

• 10

• 18

• 21

Tags

NGSS.MS-PS1-1

All of the following will form a diatomic molecule except

• Boron

• Fluorine

• Nitrogen

• Bromine

In this reaction, all of the following factors will change the concentration of CO₂ in this reaction except H₂O(g) + CO(g) ⇌ H₂(g) + CO₂(g)

• a decrease in temperature

• a decrease in pressure

• an increase in the amount of catalyst

• a decrease in the volume of H₂O

Tags

NGSS.HS-PS1-5