This determines your element's identity

• Neutrons

• Protons

• Electrons

An atom has 2 protons, 4 neutrons, and 3 electrons. What is the mass number?

• 2

• 5

• 6

This element has 5 protons, 4 neutrons, and 3 electrons. What is the atomic number?

• 5

• 4

• 3

• 9

Tags

NGSS.MS-PS1-1

An element that is a semiconductor can best be described as a

• Metal

• Non metal

• Metalloid

Iodine-127 and Iodine-124 are considered to be....

• Ions

• Isotopes

Non-metals tend to form what kind of ion and why?

• Cations because they lose electrons

• Anions

  because they lose electrons

• Cations because they gain electrons

• Anions because they gain electrons

Barium would form what type of ion?

• Cation

• Anion

What group on the periodic table does not react with anything?

• Group 1

• Group 3

• Group 18

• Grou 13

If your element has a charge of +2, what has happened to your element?

• It has gained two protons

• It has lost two protons

• It has gained two electrons

• It has lost two electrons

Tags

NGSS.MS-PS2-3

Elements in group 2 have how many valence electrons?

• 1

• 2

• 3

• 4