Semester Exam A

What is the chemical formula for Aluminum Sulfide?

• AlS
• Al₂S₃
• Al3S2
• Al+S-

Tags

NGSS.MS-PS1-1

Name the compound CF₃.

• Monocarbon Trifluoride
• Carbon Trifluoride
• Carbon Fluoride
• Monocarbon Fluoride

Tags

NGSS.MS-PS1-1

Name the compound SBr.

• Sodium Bromide
• Monosulfur Monobromide
• Sulfur Monobromide
• Sodium Monobromide

Tags

NGSS.MS-PS1-1

Which part of the atom shown below best represents the nucleus of the atom?

• A
• B
• C
• D

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NGSS.MS-PS1-1

Which subatomic particle is correctly paired with its properties?

• Electron: negatively charged; mass about equal to a neutron
• Proton: positively charged; mass about equal to an electron
• Neutron: mass about equal to that of a proton; no charge
• Proton: negatively charged; mass about equal to a proton

Where on the periodic table are the MOST reactive nonmetals found?

• Group 15
• Group 1
• Groups 3-12
• Group 17

In the periodic table, which group or family of elements has only one valence electron in its outer shell?

• the alkali metals
• the noble gases
• the halogens
• the alkaline-earth metals

Below are some nuclei containing different numbers of protons and neutrons. Which one is an isotope of potassium?

• 20 protons; 20 neutrons
• 17 protons; 22 neutrons
• 18 protons; 21 neutrons
• 19 protons; 19 neutrons

Based on the diagram below, what is the atomic mass of this atom?

• 4
• 5
• 11
• 13

Tags

NGSS.MS-PS1-1

An element has 32 protons and 40 neutrons in its nucleus. What is the element?

• a. sulfur (S)
• b. gallium (Ga)
• c. germanium (Ge)
• d. zirconium (Zr)

Tags

NGSS.MS-PS1-1