Structure of the atom/Periodic Table intro

Which statement is true about the nucleus of an atom?

• It makes up most of the atom’s volume.

• It makes up most of the atom’s mass.

• It contains protons and electrons.

• It is neutral in electric charge.

The smallest particles of an element that still have the element’s properties are

• protons

• atoms

• gluons

• quarks

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NGSS.MS-PS1-1

The mass of an atom equals the sum of its protons and neutrons.

• True

• False

Which of the following atomic particles is positively charged?

• neutron

• electron

• negatron

• proton

In an atom, what is the number of protons equal to?

• The number of electrons.

• The number of molecules.

• The number of neutrons.

• The number of nuclei.

Most of the atom is filled with

• electrons

• empty space

• the nucleus

• protons

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NGSS.MS-PS1-1

This particle determines what element you have - the elements identity.

• electron

• neutron

• proton

• megatron

If an atom were the size of a football stadium, the nucleus would be about the size of a

• ​microwave oven.

• basketball.

• pea.

• car.

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NGSS.MS-PS1-1

The atomic number of an atom is determined by the number of

• protons.

• electrons.

• neutrons.

• isotopes.

The mass of proton is measured in ______.

• nanograms

• microns

• atomic mass units

• minutiae