Exploring the Structure of Atoms

What determines the uniqueness of an element?

• Mass number

• Number of electrons

• Number of neutrons

• Number of protons

Tags

NGSS.MS-PS1-1

What is true for a neutral atom regarding its protons and electrons?

• More protons than electrons

• More electrons than protons

• Equal number of protons and electrons

• No relation between protons and electrons

Tags

NGSS.MS-PS1-1

How do you calculate the mass number of an atom?

• Protons minus neutrons

• Protons plus electrons

• Neutrons minus protons

• Protons plus neutrons

Tags

NGSS.MS-PS1-1

What is an isotope?

• Atoms with the same number of protons but different electrons

• Atoms with the same number of protons but different neutrons

• Atoms with the same number of neutrons but different protons

• Atoms with different numbers of protons, neutrons, and electrons

Tags

NGSS.MS-PS1-1

How many neutrons does Carbon-14 have?

• 14

• 6

• 7

• 8

Tags

NGSS.HS-PS1-8

What is an ion?

• An atom with equal protons and electrons

• A group of atoms with no charge

• An atom with more neutrons than protons

• An atom or group of atoms with a net charge

Tags

NGSS.MS-PS1-1

How is an anion formed?

• By gaining an electron

• By losing a proton

• By gaining a proton

• By losing an electron

What charge does a cation carry?

• Negative

• Variable

• Positive

• Neutral

What helps to remember that anions are negatively charged?

• The word 'anion' starts with 'a', which stands for 'atom'

• The word 'anion' sounds like 'negative'

• The letter 't' in 'anion' looks like a plus sign

• The letter 'n' appears twice in 'anion'

Which of the following is true for cations?

• They have no electrons

• They have an equal number of protons and electrons

• They have more protons than electrons

• They have more electrons than protons