Basic Atom Review

Which of the following is not a compound?

• HCl
• Cl
• NaCl
• CO2

Tags

NGSS.MS-PS1-1

Which of the following represents an element?

• H₂O
• H₂
• NaCl
• CaCO₃

Salt water boils and the water completely evaporates, salt (NaCl) is left in the bottom of the beaker. Which of the following is left in the beaker?

• Compound
• Element
• Mixture
• None of the Above

What cannot be broken down into other substances?

• Compound
• Mixture
• Solids
• Element

What is made up two or more elements that are chemically combined?

• Element
• Mixture
• Compound
• Solids

Tags

NGSS.MS-PS1-5

How many elements are represented in the compound?
Na₂CO₃

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

What kind of bond forms when atoms share electrons?

• Chemical bond
• Ionic bond
• Covalent bond
• Electron bond

What is the formula for hydrochloric acid?

• HCl
• _HClO
• H₃ClO₃
• HClO₃

Name that Ion
Li+

• copper (III)
• lithium
• ladmium
• iodine

Name that Ion
Cu⁺²

• Iron(III)
• colbalt(II)
• copper(II)
• cadmium