Chemistry Quiz 1 Review

Which of the following atomic symbols is written correctly?

• ee
• hE
• C
• CL

Which of the following chemical formulas represents a compound? 

• C₃
• O₂
• CH₃CHO
• H₂

Which statement best describes an element?

• made from mixture

• thousands in the world

• pure, made of only one type of atom

• can be separated

Carbon is considered an element while carbon dioxide is considered a compound. This is because carbon dioxide is –

• a gas at room temperature.
• made of two different elements.
• given off by green plants.

This picture represents which of the following?

• element
• compound
• mixture

This picture represents which of the following?

• molecule

• compound

• mixture

• heterogeneous mixture

The chemical formula for baking soda is NaHCO3. Which elements are part of this formula?

• Na, H, CO

• Na, HC, O

• NaH, CO

• Na, H, C, O

The atomic number is 2. How many protons and electrons does Helium have?

• 2 p, 2 e

• 4.003

• 2 e, 4 p

• 4 e, 2 p

Which subatomic particle has a positive charge?

• proton

• neutron

• electron

• midichlorian

Which subatomic particle has a negative charge?

• proton

• neutron

• electron

• cybertron