Atomic Structure

Atoms of which element have chemical properties most similar to those of fluorine?

• Cl

• O

• Ne

• S

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many protons, neutrons, and electrons are in a neutral atom of ²³Na?

• 11 protons, 11 neutrons, 11 electrons

• 11 protons, 12 neutrons, 11 electrons

• 12 protons, 11 neutrons, 12 electrons

• 23 protons, 11 neutrons, 23 electrons

Tags

NGSS.MS-PS1-1

Which metal is considered most reactive?

• barium

• calcium

• magnesium

• strontium

Isotopes ...

• Atoms with the same number of protons and different number of neutrons

• Atoms with a charge

• AA Baseball team from Albuquerque, NM

• Protons and neutrons in the nucleus

Tags

NGSS.HS-PS1-8

Which of the following represents an ion?

• Mg

• ⁴He

• Na⁺

• ₂₀Ca

Isotopes contain different numbers of

• Electrons

• Protons

• Neutrons

• Nuclei

Which is the ground state (normal) electron configuration of magnesium atom?

• 1s²2s²2p⁶3s²

• 1s²2s²2p⁶3s¹

• 1s²2s²3s²2p⁶

• 1s²2s²2p⁴3s²

How many elements are in the first period of the periodic table?

• 2

• 7

• 8

• 16

The elements in Group 8A, the column at the far right of the periodic table, are called...

• Noble Gases

• Halogens

• Calcogens

• Transition Metals

[Ar]4s¹ represents an element of

• Group 1A

• Rare Earth Metals

• Group 4A

• Transition Metals