6th/7th Chemistry Review (Basics)

(Choose all that apply): The chemical formula CH₄ is a(n):

• Element

• molecule

• compound

• none of the other answer choices

Tags

NGSS.MS-PS1-1

(Choose all that apply): The chemical formula H₂ is a(n):

• Element

• Molecule

• Compound

• none of the other answer choices

Tags

NGSS.MS-PS1-1

(Choose all that apply): The chemical formula Ne is a(n):

• Element

• Compound

• Molecule

• Atom

(Choose all the correct answers): Which of the following is an example of a chemical change?

• Burning wood

• Cutting wood

• Melting ice to water

• Boiling water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

(Choose all the correct answers): Which of the following is an example of a physical change?

• Baking brownies

• cutting paper

• Freezing water to make ice

• Rust forming on the metal on a car

(Choose all the correct answers): Carbon (C) has an atomic number of 6. It is in Group 13 (3A) and period 2. What type of element is it?

• Metal

• Non-metal

• Metalloid

• Noble Gas

(Choose all the correct answers): Calcium (Ca) is in group 2 (2A) and period 4 with an atomic number of 20. What type of element is it?

• Metal

• Non-metal

• Metalloid

• Noble Gas

(Choose all the correct answers): Arsenic (As) is in group 15 (5A) and period 4. Its atomic number is 33. What type of element is it?

• Metal

• Non-metal

• Metalloid

• Noble Gas

(Choose all the correct answers): Helium (He) is in group 18 (8A) and period 1. Its atomic number is 2. What type of element is it?

• Metal

• Non-metal

• Metalloid

• Noble Gas

Which of the following are properties of metals? (Choose all the correct answers)

• Electrical conductivity

• Electrical insulator

• Malleable

• Shiny