How is the mass number of an atom calculated? (1 point)

Question

Responses

electrons plus neutrons
electrons plus neutrons

total number of protons
total number of protons

protons plus neutrons
protons plus neutrons

total number of electrons

Answer 1

protons plus neutrons

Answer 2

Which atom would be neutral?(1 point)
Responses

an oxygen atom with 16 electrons, 18 protons, and 16 neutrons
an oxygen atom with 16 electrons, 18 protons, and 16 neutrons

an oxygen atom with 4 electrons, 6 protons, and 4 neutrons
an oxygen atom with 4 electrons, 6 protons, and 4 neutrons

an oxygen atom with 8 electrons, 8 protons, and 9 neutrons
an oxygen atom with 8 electrons, 8 protons, and 9 neutrons

an oxygen atom with 9 electrons, 8 protons, and 8 neutrons

Answer 3

an oxygen atom with 8 electrons, 8 protons, and 8 neutrons

Answer 4

A nitrogen ion has a mass of 14 and a charge of +2. Which subatomic particles does it contain?(1 point)
Responses

2 protons, 6 neutrons, and 6 electrons
2 protons, 6 neutrons, and 6 electrons

7 protons, 7 neutrons, and 5 electrons
7 protons, 7 neutrons, and 5 electrons

7 protons, 7 neutrons, and 9 electrons
7 protons, 7 neutrons, and 9 electrons

4 protons, 4 neutrons, and 6 electrons

Answer 5

7 protons, 7 neutrons, and 5 electrons

Answer 6

Which option is an isotope with 6 protons and 8 neutrons? (1 point)
Responses

carbon-8
carbon-8

oxygen-14
oxygen-14

carbon-14
carbon-14

oxygen-6

Answer 7

carbon-14