Grade 10 · Science · Chemistry

10th grade Ionization energy, electronegativity and reactivity trends worksheet

6 printable versionsChallenge Me10 questions · answer keyFree · no account

Level: Building Confidence · On Level · Challenge Me

When it’s done, scan the sheet with your phone and PencilGo marks it and picks the next one. Create a free account

Version

Ionization energy, electronegativity and reactivity trends

Grade 10 Science Worksheet - Challenge Me

NameDate

Circle the best answer, or write your answer on the line.

Ionization energy falls from 5.392 eV for lithium to 3.894 eV for cesium (PubChem). By what percent does it drop, to 0.01%, Ari?
Ionization energy falls from 5.139 eV for sodium to 4.341 eV for potassium (PubChem). By what percent does it drop, to 0.01%, Esme?
3.
Which has the higher electronegativity, sodium or sulfur, Jun?
- Sulfur
- Sodium
- They are equal
4.
Which is more electronegative, chlorine or bromine, Kira?
- Chlorine
- They are equal
- Bromine
5.
Which has the lower first ionization energy, potassium or magnesium, Luz?
- Magnesium
- They are equal
- Potassium
6.
Milo says cesium's outer electron is harder to remove than lithium's because cesium is bigger. Agree or disagree?
- Agree: more shells mean more grip
- Agree: big atoms hold on tighter
- Disagree: farther out, easier to remove
7.
Noah says ionization energy rises going down group 1. Agree or disagree?
- Disagree: it falls down the group
- Agree: it rises across too
- Agree: heavier atoms need more energy
8.
Pia says electronegativity is measured in joules. Agree or disagree?
- Agree: it is an energy
- Disagree: it has no units
- Agree: like ionization energy
9.
Why does PubChem list no Pauling electronegativity for neon, Tala?
- It doesn't form ordinary bonds
- It has no electrons
- It is too heavy
10.
In period 3, which has the higher first ionization energy, chlorine or argon, Zee?
- Chlorine
- They are equal
- Argon

Ionization energy, electronegativity and reactivity trends. Every version has 10 questions, and the answer key prints on the second page.

I can define first ionization energy and electronegativity (Pauling scale).
I can say both rise across a period and fall down a group; fluorine is the most electronegative element.
I can convert eV per atom to kJ/mol and find percent drops down a group.
I can link low ionization energy to reactive metals and high electronegativity to reactive nonmetals.

Standard: HS-PS1-1

first ionization energy: Energy to remove one electron from a gas-phase atom

electronegativity: How strongly an atom pulls shared electrons in a bond

Pauling scale: The usual electronegativity scale; fluorine is 3.98, and it has no units

electronvolt (eV): A tiny energy unit; 1 eV per atom = 96.485 kJ/mol

reactivity: How readily an element takes part in reactions

Your child added the energies. How much lower one is than another is a difference: subtract.

Your child divided. Per mole is far more than per atom, so multiply: 1 eV per atom = 96.485 kJ/mol.

Your child divided by the lower value. Percent drop compares with the starting value: (old − new) ÷ old × 100.

What is the most common mistake with ionization energy, electronegativity and reactivity trends?

Your child added the energies. How much lower one is than another is a difference: subtract.

Are these 10th grade science worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

Every sheet you scan goes into your child’s record: dated, marked and ready for the year-end portfolio. Homeschool records