Chemistry Atomic Theory Review

Which of these would correctly show an isotope of carbon?

• 
• 
• 
• 

Which of these would have 61 neutrons?

• Nd

• Ag

• Ca

• Ni

Which of these would have 14 electrons?

• N

• Si

• Be

• C

Tags

NGSS.HS-PS1-1

• both an isotope and an ion

• is an isotope

• is an ion

• is an atom

• both an isotope and an ion

• is an isotope

• is an ion

• is an atom

An atom is?

• the smallest particle of an element can be divided into and still be the same substance.

• a substance that cannot be chemically broken down into a simpler substance.

• a substance containing two or more elements.

• a group of atoms covalently bonded together.

An ion?

• has the same number of neutrons and protons.

• has the same number of protons and electrons.

• has a different number of protons and electrons.

• has a different number of neutrons and protons.

What is the atomic number of Neon?

• 20.18

• 10

• Neon

• Ne

Tags

NGSS.HS-PS1-1

Which of the following element symbol matches the correct number of subatomic particles?

• Li, 3 Protons, 5 Electrons
• C, 7 Protons, 6 Electrons
• S, 16 Protons, 19 Electrons
• Pb, 82 Protons, 82 Electrons

Tags

NGSS.HS-PS1-1

What do these isotopes of carbon all have in common?

• neutrons & mass number
• atomic number and neutrons
• atomic number and electrons
• protons, atomic number, and mass number