Unit 3 - Chemical Bonding

Electrons are transferred (gained or lost) in the formation of ___ bonds.

• ionic

• covalent

• metallic

• all chemical

Tags

NGSS.HS-PS1-1

Electron movement in the bonding of Group 1 elements with Group 17 elements is best described as ___.

• shared valence electrons moving in overlapped valence energy levels

• valence electrons moving from the nonmetal to the metal to create a covalent moelcule

• valence electrons moving from the metal to the nonmetal to create a solid with a crystal lattice structure

• shared valence electrons move to create bonds that result in a solid with a crystal lattice structure

Tags

NGSS.HS-PS1-2

A student is modeling the units in the formula for aluminum sulfide using the spheres shown below to represent aluminum (Al) and sulfur (S) atoms. Which model correctly shows a stable ionic compound for Aluminum Sulfide?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

Metals in Group 1 on the Periodic Table most commonly form which type of ion?

• -2 ion

• -1 ion

• +1 ion

• +2 ion

A scientists is measuring the mass of two Boron atoms. One has a mass of 10 units the other has a mass of 11 units. This is a model of a Boron atom with a mass of 11 units. What subatomic particle needs to be removed from the model to represent a Boron atom with a mass of 10 instead?

• Particle L

• Particle M

• Particle N

• Particle P

Tags

NGSS.MS-PS1-1

A molecule of methane gas is shown. What do the red and blue dots represent?

• Protons being shared between the atoms.

• Electrons being shared between the atoms.

• Protons being transferred between the atoms.

• Electrons being transferred between the atoms.

Tags

NGSS.MS-PS1-1

Metals in Group 1 on the Periodic Table most commonly form which type of ion?

• -2 ion

• -1 ion

• +1 ion

• +2 ion

A Chlorine atom reacts with a Sodium atom to form Sodium Chloride (NaCl). A Chlorine atom can also react with another Chlorine atom to form a Chlorine molecule (Cl₂). Which statement best explains the behavior of Chlorine in these two reactions?

• A Chlorine atom can only form a covalent bond with another atom by sharing electrons and cannot form an ionic bond.

• A Chlorine atom can form ionic bonds by accepting an electron and covalent bonds by sharing electrons.

• A Chlorine atom can form an ionic bond with another atom by accepting an electron.

• A Chlorine atom can form ionic bonds by sharing electrons and covalent bonds by accepting an electron.

The elements Neon (Ne) and Argon (Ar) are not reactive. Which hypothesis best explains this?

• They are not stable atoms.

• They are not readily available on Earth.

• They give up all of their valence electrons easily.

• They have the max number of valence electrons.

Based on the image, determine the formula for a compound formed between Lithium and Sulfur.

• Li2S

• Li3S

• LiS

• LiS2

Tags

NGSS.MS-PS1-1