Elements

What does the atomic number tell us?

• The number of protons

• The number of electrons

• The number of neutrons

• The mass of the atom

Which is an electron?

• A
• B
• C

What do the elements highlighted in red have in common?

• The same number of protons

• The same number of electrons

• The same number of neutrons

• The same number of electron shells

Which of the following best describes the three general groups of elements?

• solids, liquids, gas

• metals, nonmetals, gases

• metals, nonmetals, metalloids

• metals, metalloids, synthetics

The nucleus of an atom is made of ________ and ________ .

• protons + neutrons

• electrons + protons

Elements that have properties of both metals and nonmetals; sometimes referred to as semiconductors

• Metalloids

• Atoms

• Neutrons

• Metals

Which of the following is a compound?

• H₂O - water

• C - carbon

• Li - Lithium

• O_{2 - oxygen}

These are found on the Periodic Table.

• Compounds
• Elements
• Mixtures

What is the chemical symbol of this element?

• 8

• O

• Oxygen

• 15.999

What is the chemical symbol for copper?