Elements and Compounds in Chemistry

What is the hardest mineral known to man?

• Silicon

• Iron

• Diamond

• Graphite

Which element is the most abundant in the Earth's crust?

• Silicon

• Oxygen

• Iron

• Calcium

What is the mnemonic to remember the five elements present in the Earth's crust?

• Copper, Iron, Mercury, Potassium

• Oxygen, Hydrogen, Chlorine, Sodium

• Oxygen, Silicon, Aluminum, Iron, Calcium

• Carbon, Fluorine, Hydrogen, Nitrogen

Tags

NGSS.MS-ESS3-1

Which element is most abundant in the human body?

• Nitrogen

• Hydrogen

• Carbon

• Oxygen

What is the chemical symbol for Aluminum?

• Al

• Au

• Am

• Ag

Which element has the chemical symbol 'Fe'?

• Fluorine

• Iron

• Mercury

• Potassium

What is a compound?

• A substance consisting of atoms of two or more elements chemically combined

• A mixture of different elements

• A substance that cannot be broken down

• A pure substance made of one kind of atom

Tags

NGSS.MS-PS1-1

Which of the following is an organic compound?

• Water (H2O)

• Ammonia (NH3)

• Methane (CH4)

• Table Salt (NaCl)

Tags

NGSS.HS-LS1-6

Which of the following is an inorganic compound?

• Ethanol (C2H5OH)

• Carbon Dioxide (CO2)

• Methane (CH4)

• Glucose (C6H12O6)

Tags

NGSS.MS-PS1-1

What is the chemical formula for table salt?

• KCl

• NaCl

• CaCl2

• MgCl2