Structure of the Atom

Order these chronologically and based on who proposed the model.

Groups:

(a) 1904 - Thomson

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(b) 1911 - Rutherford

,

(c) 1913 - Bohr

,

(d) Current - Electron Cloud

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Tags

HS-PS1-1

Using the periodic table, label the correct element symbol next to the name.

a

b

c

d

e

f

Hg

N

O

K

Fe

Na

Tags

HS-PS1-1

Atoms consist of negatively charged (a)   that orbit the (b)   . The nucleus consists of positively charged (c)   and neutral (d)   . Protons and neutrons are each made from three (e)   .

• electrons

• nucleus

• protons

• neutrons

• quarks

Answer explanation

Atoms consist of negatively charged electrons that orbit the nucleus. The nucleus consists of positively charged protons and neutral neutrons. Protons and neutrons are each made from three quarks.

Tags

HS-PS1-1

Match the Following

• A substance that cannot be broken down into simpler substances by chemical means.

• Atom

• Positively charged particles found in the nucleus of an atom.

• Proton

• The dense center of an atom containing protons and neutrons.

• Element

• Particles with a neutral charge found in the nucleus of an atom.

• Nucleus

• The smallest unit of an element that keeps the element’s chemical properties.

• Neutron

Tags

HS-PS1-1

Match the following letters with their correct representation in atomic structure.

• Letter representing a neutron

• C

• Letter representing a proton

• B

• Letter representing the nucleus

• A

• Letter representing an electron

• D

Tags

HS-PS1-1

Quarks make up which two subatomic particles?

• protons and neutrons

• protons and electrons

• neutrons and electrons

• protons and ions

Answer explanation

Quarks make up protons and neutrons, not electrons or ions. Therefore, the correct answer is protons and neutrons.

Tags

HS-PS1-1

Organize these options based on the type of model represented in the picture.

Groups:

(a) Scaled-up Model

,

(b) Scaled-down Models

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Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

What is the charge of a proton?

• Negative

• Positive

• Neutral

• Variable

Answer explanation

A proton has a positive charge, making the correct answer choice 'Positive'.

Tags

HS-PS1-1

Which subatomic particle is not found in the nucleus of an atom?

• Proton

• Neutron

• Electron

• All of the above are found in the nucleus

Answer explanation

The correct choice is Electron because it is not found in the nucleus of an atom, unlike Protons and Neutrons.

Tags

HS-PS1-1

What does the atomic number of an element represent?

• The number of protons in the nucleus

• The number of neutrons in the nucleus

• The total number of protons and neutrons in the nucleus

• The total number of protons and electrons in an atom

Answer explanation

The atomic number of an element represents the number of protons in the nucleus, which uniquely identifies the element.

Tags

HS-PS1-1