Protons, Electrons, Neutrons

Carbon has how many protons?

• 12

• 6

• 7

• 4

Tags

NGSS.MS-PS1-1

Which two particles make up the nucleus of an atom?

• Protons and Electrons

• Protons and Neutrons

• Molecules and Compounds

• Neutrons and Electrons

What is the role of an electron in an atom?

• Electrons live inside the nucleus and carry a neutral charge.

• Electrons circle the nucleus and have a positive charge.

• Electrons circle the nucleus and have a negative charge.

• Electrons live inside the nucleus and have a negative charge.

Which description about the proton is accurate?

• Positively charged particle with a mass less than 0 amu

• A neutrally charged particle with a mass less than 0 amu

• Positively charged particle with a mass of 1 amu

• A neutrally charge particle with a mass of 1 amu

Tags

NGSS.MS-PS1-1

How does the mass number differ from the atomic number in terms of atomic structure?

• Mass number includes electrons; atomic number does not.

• Mass number is the sum of protons and neutrons; atomic number is the number of protons.

• Mass number is the number of protons; atomic number is the sum of protons and neutrons.

• Mass number is the number of neutrons; atomic number is the number of electrons.

Tags

DOK Level 3: Strategic Thinking

What would happen to the atomic number if an atom loses a proton?

• It would increase by one.

• It would decrease by one.

• It would remain the same.

• It would double.

Tags

DOK Level 3: Strategic Thinking

What is the mass number of an atom, and how is it calculated?

• The number of protons; calculated by adding protons and electrons.

• The number of electrons; calculated by subtracting neutrons from protons.

• The sum of protons and neutrons; calculated by adding protons and neutrons.

• The number of neutrons; calculated by subtracting electrons from protons.

Tags

DOK Level 2: Skill/Concept

Explain why the number of electrons in a neutral atom is equal to the number of protons.

• Because electrons and protons are the same particles.

• Because the charges of electrons and protons cancel each other out.

• Because neutrons balance the number of electrons.

• Because the atomic number is always even.

Tags

DOK Level 3: Strategic Thinking

An atom of tin has an atomic number of 50 and an atomic mass of 119. How many neutrons does it have?

• 50

• 69

• 119

• 169

Tags

DOK Level 2: Skill/Concept

An atom of carbon has an atomic mass of 12. If the atom gains a neutron, what will be the new mass number?

• 12

• 11

• 13

• none of the above

Tags

DOK Level 3: Strategic Thinking