Topic 1 Lessons 1 and 2 Check In

Label the parts of the periodic square.

a

b

c

d

Element Name

Mass Number

Atomic Number

Chemical Symbol

Isotope Mass

Atomic Mass

Isotope

Average Elemental Mass

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NGSS.MS-PS1-1

What is an isotope?

Use the words: protons, neutrons, and element in your definition

What is the mass number of this nitrogen isotope?

• 7

• 21

• 14

• 11

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NGSS.MS-PS1-1

What is the atomic number of this nitrogen isotope?

• 7

• 21

• 14

• 11

Tags

NGSS.MS-PS1-1

What does the atomic number of an element tell you?

The __________ of _____________.

(write each word that completes the blanks, in order, no punctuation).

Which of these CANNOT be found by simply viewing the periodic table?

• The number of protons in an atom

• The number of protons in an isotope

• The atomic mass of an element

• The mass number of an isotope

Atomic mass is defined as:

• The number of protons in an atom

• The total number of protons and neutrons in an atom

• The number of electrons in an atom

• The average mass of all isotopes of an element

What does this figure represent?

• An element

• A water molecule

• An atom

• A waveform

Tags

NGSS.MS-PS1-1

Choose the true statement.

• Protons are positively charged sub-atomic particles found spaced away from the nucleus in orbitals of an atom.

• Protons are positively charged sub-atomic particles found in the mitochondria of an atom.

• Protons are positively charged sub-atomic particles found in the nucleus of an atom.

• Electrons are non-charged sub-atomic particles

Electrons are​ (a)   charged sub-atomic particles found ​ (b)  

• negatively
• in orbitals
• positively
• neutrally
• in the nucleus
• in space

Tags

NGSS.MS-PS1-1