Atoms & Isotopes

What number should be written under the 33 in this isotope notation for sulfur?

• -1

• 17

• 16

• 32

Tags

NGSS.MS-PS1-1

In this model of standard notation, X would be the ​ (a)   , A would be the ​ (b)   , and B would be the ​ (c)   .

• atomic symbol
• mass number
• atomic mass
• number of neutrons

Tags

NGSS.MS-PS1-1

In the name Carbon-14 the "14" represents the ______.

• mass number

• atomic number

• number of protons

• number of electrons

Tags

NGSS.HS-PS1-8

What is the name of the isotope pictured in the notation above?

• Chlorine Ion

• Chlorine-17

• Chlorine-35

• Chlorine-18

Two atoms of the same element that have different mass numbers are called ________.

• molecules

• isotopes

• variables

• ions

One atom of Lithium contains ​ (a)   protons and ​ (b)   neutrons.

• 3
• 4
• 6
• 7

Tags

NGSS.MS-PS1-1

How many electrons does a Copper atom have?

• 63
• 29
• 92
• 34

What do these isotopes of carbon all have in common?

• neutrons & mass number
• atomic number and neutrons
• atomic number and electrons
• protons, atomic number, and mass number

Identify the parts of the atom

a

b

c

Proton

Electron

Neutron

Tags

PS.M.2 Atoms

Classify the elements:

Groups:

(a) Metals

,

(b) Nonmetals

,

(c) Metalloids

• Sulfur

• Selenium

• Potassium

• Antimony

• Magnesium

• Chlorine

• Silicon

• Gallium

• Cadmium