Chemical Bonding and Reactions

Select the correct formula for boron trichloride.

• B₂Cl

• B₃Cl

• BCl₃

• BCl₂

Tags

NGSS.MS-PS1-1

___Fe + ___O₂ ---> ___Fe₂O₃

Which set of coefficients will correctly balance the equation?

• Already Balanced (no coefficients needed)

• 2, 3, 4

• 4, 3, 2

• 3, 2, 2

Tags

NGSS.MS-PS1-5

How many chlorine (Cl) atoms are in 3MgCl₂?

• 2

• 3

• 5

• 6

Tags

NGSS.MS-PS1-1

If you start a chemical reaction with 5 atoms of helium, how many atoms will you have after?

• 4 atoms

• 10 atoms

• 1 atom

• 5 atoms

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

An atom with 1 valence electron 'needs' a full shell, so it can either gain 7 electrons or lose 1. Which is more likely to occur?

• nothing

• gain 7

• lose 1

How do covalent bonds form?

• by sharing electrons between atoms

• by donating or receiving electrons

Tags

NGSS.HS-PS1-1

What two types of atoms make a covalent bond?

• 2 nonmetals

• 2 metals

• 1 metal and 1 nonmetal`

Ionic bonds are between

• metals and nonmetals

• 2 metals

• 2 nonmetals

Atoms involved in a covalent bond are not charged, while atoms involved in an ionic bond are charged (negative or positive)

• true

• false

Is this ionic bond drawn correctly?

• Yes

• No

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5