Sci7 Term 3 Exam Reviewer

Which of the following is TRUE about atoms?

• It is the smallest divisible particle of matter.

• It is the smallest indivisible particle of matter.

• It is the smallest identifiable unit into which a pure substance can be divided.

• It is the smallest identifiable unit into which a pure substance cannot be divided.

What is the chemical symbol of Silver?

• Si

• S

• Au

• Ag

Which of the following BEST describes a metal?

• Conductor

• Buoyant

• Elastic

• Brittle

The number of protons is always equal to the

• atomic mass

• number of neutrons

• atomic number

• group number

Refer to the chemical equation below. Which of the following is the product?

• Na2O

• H2O

• NaOH

• Na2O and H2O

When an atom loses an electron, then it will become a

• molecule

• ion

• positive ion

• negative ion

How many electron/s is/are needed to complete the outer shell of Fluorine?

• 1

• 2

• 3

• 7

When an atom gains 2 electrons to complete the outermost shell, then its charge is

• +2

• -2

• +6

• -6

Which of the following is not a metalloid?

• Germanium

• Arsenic

• Antimony

• Astatine

Which of the following elements belong to group 2A?

• Krypton

• Magnesium

• Sulfur

• Sodium