unit 2-Chemical changes

Which is evidence of a chemical reaction?

• the light produced by magnesium when burned

• the evaporation of water from a solution

• the fizzing of a soft drink

• the heat from a light bulb

Tags

NGSS.MS-PS1-2

Select the compound

• Ammonia(NH3)

• Neon (Ne)

• Ozone (O3)

• Nitrogen(N2)

Tags

NGSS.MS-PS1-1

Select the Compound

• Water (H2O)

• Magnesium(Mg)

• Iron(Fe)

• Copper(Cu)

Tags

NGSS.MS-PS1-1

A sample of matter is made of identical particles. The sample could be

• a mixture

• an atom

• a molecule

• an element

What is a trait a sample must have to be an element?

• sample has different types of particles

• the sample can only be seen with a microscope

• the sample is a liquid at room temperature

• the sample is made of only one type of atom

What chemical symbol is used for copper

• C

• Cu

• Cp

• Co

What chemical symbol is used for Iron?

• Pb

• I

• Fe

• Ir

Which describes a property of all elements?

• all elements exist in the solid phase

• All elements are pure substances

• all elements are metals

• all elements have six electrons

Which of these is the chemical symbol for magnesium?

• Mu

• Mn

• Mg

• Ma

A student sees the diagram shown in a textbook. What does the symbol in the diagram represent?

• a compound

• a molecule

• an isotope

• an element

Tags

NGSS.MS-PS1-1