Onramps Chemistry

Which of the following has bond angles of 180^o

• HO₂ ^-

• I₃ ^-

• NH ₂^-

• O₃

Bonding – Rank polarity based on change in EN Rank the bonds

• Be-H < B-N < N-O < C-F < H-F

• Be-H < N-O < B-N < H-F < C-F 

• N-O < Be-H < B-N < H-F < C-F

• N-O < Be-H < B-N < C-F < H-F 

Which of the following has the lowest lattice energy?

• KI

• KCl

• LiCl

• KBr

Tags

NGSS.HS-PS2-4

Ionic compounds – rank lattice energy Rank the crystal lattice energy of the salts MgBr₂, KNO₃, SrS, LiF, CaI₂ From greatest to least

• SrS > CaI2 > MgBr2 > KNO3 > LiF

• SrS > MgBr2 > CaI2 > LiF > KNO3

• KNO3 > SrS > MgBr2 > CaI2 > LiF

• SrS > CaI2 > MgBr2 > LiF > KNO3

Tags

NGSS.HS-PS1-3

NGSS.HS-PS1-4

a molecule or an atom which has a positive or negative charge due to losing or gaining one or more electrons

• Mass

• Ion

• Notion

• Neutron

Tags

NGSS.MS-PS2-3

What do we call an atom that has become charged by gaining or losing electrons?

• Ion

• Isotope

• Electron

• Valence Electron

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the name of a positive ion

• Cation

• Anion

What is a positive ion called?

(a)  

• anion

• cation

• isotope

• covalent

The special word for the positively charged electrode is…

• the negative electrode

• the cathode

• the anode

• the positive electrode

The solution of ions in electrolysis is called an _________ solution?