Introduction to Periodic Table

The atomic number of an element tells the number of _____ in the nucleus of an atom of that element.

• protons

• neutrons

• electrons

• isotopes

Which item on this element square represents the atomic number?

• 13

• Al

• Aluminum

• 26.981538

Tags

NGSS.MS-PS1-1

What is the atomic mass of "F"

• 9

• 18

• 17

• 19

As you move left to right on a row or period what happens?

• Atomic number increases by 1

• Electrons decrease

• Number of shells decrease

• Nothing

Mendeleev's genius was his ability to

• predict elements that were not discovered yet

• organize elements by their mass

• had an element named after himself

• organize elements by properties

Elements in the same group have __________

• Similar Properties

• Same number of shells

• Similar Mass

The number of electrons found in the last energy level-

• Valence electrons

• Group electrons

• Periods

• Neutrons

True or False: Metals have luster.

• True

• False

What are valence electrons?

• Any of an atom's electrons

• Electrons located on the first energy level

• Electrons not attached to any atom

• electrons located on the outer energy level

Which is a proton?

• A

• B

• C

Tags

NGSS.MS-PS1-1