Properties of Matter

If a sample of gold were reduced to the smallest possible particles of pure gold, which statement would most accurately describe the result?

• The sample would be reduced to atoms of gold

• The sample would be reduced to molecules of gold.

• The sample would be reduced to protons and neutrons of gold

• The sample would be reduced to electrons and protons of gold

Tags

NGSS.MS-PS1-1

Audra is looking at a diagram of an oxygen atom. Which particle(s) does she see inside the nucleus?

• protons only

• electrons only

• protons and neutrons

• electrons and protons

Which distinguishes an atom of one element from an atom of a different element?

• the number of protons

• . the number of neutrons

• the number of electrons

• the number of neutrons and protons

Which of the following comparisons correctly describes subatomic particles?

• A neutron has a neutral charge and a mass larger than the mass of an electron.

• A neutron has a negative charge and a mass smaller than the mass of a proton.

• An electron has a negative charge and a mass larger than the mass of a proton.

• A proton has a positive charge and a mass smaller than the mass of an electron.

Which of the following best describes the relationship between subatomic particles in any neutral atom?

• The number of protons equals the number of neutrons.

• The number of protons equals the number of electrons.

• The number of neutrons equals the number of electrons

• The number of neutrons is greater than the number of protons

The diagram below shows how our understanding of the structure of the atom has changed over time. Based on these models, which statement correctly describes what has happened to the theory of atomic structure over time?

• It has remained constant and unchanged since its development.

• It has been completely rejected once new data show it to be false

• It has been updated and modified based on the new data collected.

• It has remained basically intact but has been updated based on opinions and beliefs.

Tags

NGSS.MS-PS1-1

What are the vertical columns on the periodic table called?

• groups

• periods

• protons

• valence electrons

Which property of an atom or element will determine how it reacts with other elements or atoms?

• protons

• neutrons

• electrons

• valence electrons

who discovered the first scientific and systematic periodic table

• Henry Mosley

• Dmitri Mendeleev

• John Dalton

• sir Isaac Newton

choose the correct statement

• the vertical column in the periodic table is called period

• the vertical column in the periodic table is called group

• the horizontal row in the periodic table is not called period

• none of the above