Grade 10 · Science · Chemistry

10th grade Ionization energy, electronegativity and reactivity trends worksheet

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Ionization energy, electronegativity and reactivity trends

Grade 10 Science Worksheet - Building Confidence

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

Lithium's first ionization energy is 5.392 eV and sodium's is 5.139 eV (PubChem). How much lower is sodium's, to 0.01 eV, Ari?
Sodium's first ionization energy is 5.139 eV and potassium's is 4.341 eV (PubChem). How much lower is potassium's, to 0.01 eV, Bo?
Read this first
increases
First ionization energy and electronegativity both increase across a period, left to right, and up a group. Fluorine has the highest electronegativity, 3.98 on the Pauling scale.
3.
On the map, what happens to ionization energy going down a group, Jun?
- It rises
- It stays the same
- It falls
4.
On the map, what happens to electronegativity across a period, Kira?
- It falls
- It rises
- It stays the same
5.
On the map, which element has the highest electronegativity, Luz?
- Fluorine
- Cesium
- Lithium
6.
What is first ionization energy, Milo?
- Energy to melt a sample of the element
- Energy to add a proton
- Energy to remove one electron
7.
What does electronegativity describe, Noah?
- Pull on shared electrons
- The number of neutrons inside
- Speed of electrons
8.
What units does a Pauling electronegativity have, Pia?
- Joules, like other energies
- No units: a scale number
- Grams
9.
Which element is the most electronegative, Tala?
- Fluorine
- Oxygen
- Chlorine
10.
Which is more electronegative, carbon or oxygen, Zee?
- They are equal
- Oxygen
- Carbon

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.

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