Group 2 elements are most likely to bond with group 17 elements in which ratio?

• 1:2

• 2:1

• 1:1

• 2:2

Which of the following are covalent compounds?

• Zn²⁺

• CH₂O

• NH₄⁺

• NaI

• F₂

Which of the following bonds will be most polar?

• Si-O

• C-H

• O-O

• B-F

Tags

NGSS.HS-PS1-2

Will beryllium and chlorine form a nonpolar, polar, or ionic bond? What is your reasoning?

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following best explains why copper conducts electricity?

• It can have two or three valence electrons

• It has delocalized electrons that can flow in a circuit

• It is a transition metal

• It has a low electronegativity

Tags

NGSS.HS-PS1-3

Atoms are most likely to form a bond:

• When they are at the lowest potential energy possible

• When they are at the highest potential energy possible

• When they are opposite charges

• When they are close enough for valence electrons to be attracted to the other atom's nucleus

• When they are so close their nuclei are touching

Does this model represent an ionic compound? Why or why not?

Tags

NGSS.HS-PS1-3

What is a substitutional alloy?

• A metal with one element

• A metal with two elements of similar size

• A metal with two elements of very different sizes

• A metal with layers of different elements

Which is the correct Lewis structure for the compound CH₂O?

• 
• 
• 
• 

What hybridization exists for the compound CH₂O?

• sp³

• sp²

• sp

• there is no hybridization