Chemistry Sem 1 Exam Review

Which scientist is associated with the discovery of the electron?

• Democritus

• Dalton

• Thomson

• Rutherford

What is the process of naming and formula writing for ionic compounds?

• Using prefixes

• Using Roman numerals

• Using scientific notation

• Using conversion factors

What is the term for evaluating both numerical and descriptive data?

• Calibration

• Validation

• Measurements

• Dimensional analysis

Tags

NGSS.HS-ESS3-5

What is a chemical change?

• A change that affects the form of a chemical substance, but not its chemical composition

• A change that results in the formation of a new substance

• The ability to dissolve in water

• The ability to conduct electricity

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Identify silver as an element (E), compound (C), heterogeneous mixture (HE), or homogeneous mixture (HO).

• Element (E)

• Compound (C)

• Heterogeneous mixture (HE)

• Homogeneous mixture (HO)

Identify sugar as an element (E), compound (C), heterogeneous mixture (HE), or homogeneous mixture (HO).

• Element (E)

• Compound (C)

• Heterogeneous mixture (HE)

• Homogeneous mixture (HO)

Identify barium sulfate as an element (E), compound (C), heterogeneous mixture (HE), or homogeneous mixture (HO).

• Element (E)

• Compound (C)

• Heterogeneous mixture (HE)

• Homogeneous mixture (HO)

Identify boiling water as a physical change (PC) or a chemical change (CC).

• Physical change (PC)

• Chemical change (CC)

• Neither

• Both

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

What is the atomic number of an element with 17 protons?

• 16

• 17

• 18

• 19

What is the definition of atomic mass?

• Number of protons in an atom

• Number of neutrons in an atom

• Average mass of all isotopes

• Number of electrons in an atom

Tags

NGSS.HS-PS1-7