Atomic Structure

1. Which of the following methods would be most useful for describing atoms?

• visualizing with a microscope

• observing in a test tube

• constructing a model

• touching it with bare hands

Tags

NGSS.MS-PS1-1

1. An atom containing six positive charges and six negative charges has a ______ charge.

• positive

• negative

• strong negative

• no net charge

1. Democritus believed that the universe was made of empty space and _______.

• molecules

• compounds

• elements

• atoms

1. Atoms consist of a positively charged CENTER called a(n) _______.

• proton

• neutron

• electron

• nucleus

1. The negative charged particles outside the nucleus of an atom are _______.

• extracellular material

• electrons

• neutrons

• quarks

1. Which of the following atomic particles is electrically neutral?

• neutron

• proton

• electron

• positron

1. Which of the following atomic particles is positively charged?

• neutron

• electron

• proton

• negatron

1. What nineteenth-century English scientist offered proof that atoms existed?

• Aristotle

• Democritus

• John Dalton

• Isaac Newton

1. atoms with the same number of protons , but differing numbers of neutrons 

• Atom

• Group/Family

• Ion

• Isotope

An atom or molecule with a net electric charge due to the loss or gain of electrons, such as cations and anions

• Atom

• Isotope

• Ion

• Group/Family