Chemistry B CP

Which of the following statements is NOT true about what happens in all chemical reactions?

• The ways in which atoms are joined together change

• New atoms are formed as products

• The starting substances are called reactants

• The bonds of reactants are broken and new bonds of products are formed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Noble gases don't react with anything else because...

• they are too large

• they are gases

• they have 8 valence electrons

• they need to gain 1 valence electron

What is the name for this compound?
MgCl₂

• Magnesium dichloride

• Monomagnesium dichloride

• Magnesium chloride

• Chloride dimagnesium

Tags

NGSS.MS-PS1-1

The study of the composition, structure, and properties of matter and the changes it undergoes.

• Chemistry

• Physics

• Biology

• Social Science

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-4

What is matter?

• a pure substance

• anything that occupies space and possesses mass

• an element

• a compound

Tags

NGSS.MS-PS1-4

Which one of these is a chemical property?

• melting point

• boiling point

• color

• flammability

___________ are the smallest unit of an element that maintains the properties of that element.

• Atoms

• Elements

• Compounds

• Mixtures

Tags

NGSS.MS-PS1-1

A __________________ is a substance that has definite physical and chemical properties such as appearance, melting point, and reactivity.

• mixture

• pure substance

• compound

• element

Which of these is a compound?

• Aluminium (Al)

• Carbon Dioxide (CO2)

• Nitrogen (N)

• Sand

Tags

NGSS.MS-PS1-1

Which of the following determines the type of element that an atom makes?

• The size of the nucleus.

• The number of protons.

• How much the atom weighs.

• The number of neutrons.