American Chemical Society General Chemistry Exam

A scientist is working in the lab, with compounds containing carbon. She is most likely working in the field of

• Organic
• Inorganic
• Analytical
• Physical

The smallest unit of matter that retains the properties of that matter is

• a molecule
• a compound
• a mixture
• an atom

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Which statement best describes an element?

• any combination of two or more atoms of different types
• a pure substance made up of only one kind of atom
• a substance containing only carbon atoms
• any kind of crystal

The atomic number is the number of ________ in the nucleus of an atom.

• protons

• neutrons

• electrons

Isotopes differ in the number of ________.

• protons

• neutrons

• electrons

Tags

NGSS.HS-PS1-8

Hydrogen gas (H2) is an example of a

• molecule

• compound

• both a molecule and a compound

Number of valence electrons in Neon

• 0

• 8

• 12

Tags

NGSS.HS-PS1-1

The bond that involves a transfer of electrons to achieve a complete outer shell

• ionic

• covalent

• hydrogen

Positively charged subatomic particles

• protons

• neutrons

• electrons

_______ are found inside the nucleus of an atom.

• protons only

• protons and neutrons

• protons, neutrons, electrons

• electrons only

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-8