Elements and Compounds Practice

What chemical symbol represents the element iron?

• Fe

• I

• Ir

• Pb

Which of these is the chemical symbol for magnesium?

• Ma

• Mg

• Mn

• Mu

Which describes a property of all elements?

• All elements are metals.

• All elements have six electrons.

• All elements are pure substances.

• All elements exist in the solid phase.

What is a compound?

• A mixture of different substances

• A pure substance made of only one type of atom

• A substance formed when two or more elements are chemically bonded

• A single element

Tags

NGSS.MS-PS1-1

What is an element?

• A substance that can be broken down into simpler substances

• A pure substance made of only one type of atom

• A mixture of different substances

• A combination of two or more elements

Which of the following is an example of an element?

• Carbon (C)

• Air

Which of the following is a compound?

• Oxygen (O)

• Gold (Au)

• Helium (He)

Tags

NGSS.MS-PS1-1

What is the smallest unit of an element that retains its properties?

• Molecule

• Atom

• Compound

• Mixture

Which of the following statements is true about compounds?

• Compounds can be separated into their elements by physical means

• Compounds have properties similar to their constituent elements

• Compounds are formed by chemical reactions

• Compounds are mixtures of elements

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Put the terms in the correct category

Groups:

(a) element

,

(b) compound

,

(c) mixture

• sugar

• Gold

• Oxygen

• air

• cereal

• saltwater

• concrete

• He

• OH

• Iron

• Water

• salad

• H2O2

• Carbon

• NaCl

• Na

• sand

• CO2

Tags

NGSS.MS-PS1-1