atoms and periodic table test 1 review

Which of these phrases best describes an atom?

• A positive nucleus surrounded by a hard negative shell

• a positive nucleus surrounded by a cloud of negative charges

• a hard sphere with positive particles uniformly embedded

• a hard sphere with negative particles uniformly embedded

Tags

NGSS.MS-PS1-1

Most of the volume of the atom is composed of

• protons

• electrons

• neutrons

• empty space

The nucleus is the part of the atom that

• consists mostly of empty space

• has a negative charge

• occupies most of the atom's total volume

• contains most of the atom's total mass

Which statement is true about the charges assigned to an electron and a proton?

• both an electron and a proton are positive

• an electron is positive and a proton is negative

• an electron is negative and a proton is positive

• both an electron and a proton are negative

Isotopes of an element must have different

• atomic numbers

• neutrons

• protons

• electrons

A neutral atom contains 12 neutrons and 11 electrons. The number of protons in the this atom is

• 1

• 11

• 12

• 23

Tags

NGSS.MS-PS1-1

Which subatomic particle has no charge?

• alpha particle

• proton

• neutron

• electron

The number of neutrons in the nucleus of an atom can always be determined

• by subtracting the atomic mass from the isotope number

• by subtracting the atomic number from the atomic mass

• by subtracting the mass number from the atomic number

• by subtracting the isotope number from the atomic mass

Which particles determine the atomic number of an element?

• protons

• neutrons

• neutrons plus protons

• neutrons plus electrons

What is the atomic number of an atom with 5 protons, 6 neutrons, and 5 electrons?

• 1

• 5

• 6

• 10