Atoms

Which of the following atoms would have a charge of 1?

• An atom with 9 protons, 9 electrons, and 9 neutrons

• An atom with 7 protons, 11 electrons, and 8 neutrons

• An atom with 5 protons, 5 electrons, and 4 neutrons.

• An atom with 6 protons, 5 electrons, and 7 neutrons

The nucleus of the atom contains 8 protons and 9 neutrons. The atom is electrically neutral. How many electrons does this atom have?

• 4

• 8

• 9

• 15

Tags

NGSS.MS-PS1-1

If an atom has 17 protons, 18 neutrons, and 17 electrons, what is the mass of this atom?

• 17

• 18

• 35

• 52

Tags

NGSS.MS-PS1-1

The charge of an atom is determined by the -

• shape of the electron cloud

• atomic mass of the element.

• radius of the outermost electron.

• number of protons and electrons.

Tags

NGSS.HS-PS1-7

Which of the following lists the two subatomic particles that contribute the most to the mass of an atom?

• Protons and electrons

• Protons and neutrons

• Neutrons and electrons

• Electrons and ions

A certain atom has 11 electrons, 8 neutrons, and a charge of -1. What is its atomic mass?

• 19

• 15

• 11

• 18

Tags

NGSS.MS-PS1-1