What is the mass number ?

the number of protons and neutrons

the number of protons and electrons

The number of protons in an element can be found by:

looking up the group the element is in.

subtracting the atomic mass from atomic number

How do you decide which isotope is the most common by looking at the periodic table?

Round the atomic mass to the nearest whole number.

Round the atomic number to the nearest whole number

The periodic table does not provide this information.

What quantities vary between isotopes of an element?

protons, electrons, and atomic mass

protons, electrons, and atomic number

which explanation of this notation is correct?

6 tells you there are 6 protons

6 tells you there are 6 neutrons

Protons, Neutrons, and Electrons

Authored by Karla Shiveley

Chemistry

7th - 8th Grade

NGSS covered

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What number is circled?

Number of Neutrons

Number of Protons

Atomic Mass

Number of Electrons

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many electrons does an atom of Krypton have?

83.80

47.80

119.80

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How many electrons does a Hydrogen atom have?

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

How many neutrons does an Oxygen atom have?

7.999

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

What is the number highlighted?

Atomic number

Atomic mass

Number of protons

Number of electons

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What does this number represent?

Number of protons

Number of neutrons

Number of electrons

Number of protons and neutrons

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the atomic mass of Sodium?

22.9898

33.9898

11.9898

Tags

NGSS.MS-PS1-1

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Protons, Neutrons, and Electrons

What number is circled?

How many electrons does an atom of Krypton have?

How many electrons does a Hydrogen atom have?

How many neutrons does an Oxygen atom have?

What is the number highlighted?

What does this number represent?

What is the atomic mass of Sodium?

What is the atomic mass of Neon?

What is the mass number?

This particle is found in the nucleus and has a positive charge

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