Chemistry 1st Semester Exam 2019-2020

The chemical formula for an ionic compound of potassium and oxygen is

• KO.
• K₂O.
• K₂O₂.
• KO₂.

Tags

NGSS.MS-PS1-1

What are the electrons in the highest energy level of an atom and have the ability to react are called?

• orbital electrons

• valence electrons

• anions

• cations

What is the NAME of... FeP

• Iron (II) phosphide

• Iron phosphide

• Iron (III) phosphide

• Iron (III) phosphorus

What is the correct name for C₄H₆?

• Carbon Hexahydride
• Pentacarbon Pentahydride
• Hexacarbon Tetrahydride
• Tetracarbon Hexahydride

Tags

NGSS.MS-PS1-1

What electron configuration matches an oxygen atom?

• 1s²2s²2p⁶3s2, 3p⁶4s²3d¹⁰4p⁵
• 1s²2s²2p⁴
• 1s²2s²2p⁶
• 1s²2s²2p⁶3s²3p⁶4s²3d¹

Tags

NGSS.HS-PS1-1

What atom matches this electron configuration?

[Kr] 5s²4d⁹

• Silver

• Gold

• Platinum

• Cadmium

This picture represents: 

• Element
• Compound
• Mixture of Elements
• Mixture of Compounds

Tags

NGSS.MS-PS1-1

Which is a chemical property of matter?

• Reactivity

• Color

• Density

• Solubility

An example of an extensive physical property is _________.

• Mass

• Color

• Density

• Boiling point

What is the volume of Object X?

• 10.0 cm³
• 15.0 cm³
• 20.0 cm³
• 25.0 cm³

Tags

CCSS.HSG.MG.A.2