Atomic and ionic size across the periodic table
Grade 10 Science Worksheet - Building Confidence
Circle the best answer, or write your answer on the line.
Sodium's atomic radius is 180 pm and magnesium's is 150 pm (Slater). How many pm smaller is magnesium, Ari?
Magnesium's atomic radius is 150 pm and aluminum's is 125 pm (Slater). How many pm smaller is aluminum, Bo?
Aluminum's atomic radius is 125 pm and silicon's is 110 pm (Slater). How many pm smaller is silicon, Esme?
Using the table, which atom is largest, Jun?
- Sodium
- Cesium
- Silicon
Using the table, what happens to radius down group 1, Luz?
Use the picture in question 4.
- It grows
- It shrinks
- It stays the same
Why do atoms get smaller across a period, Milo?
- They lose shells
- More protons pull the same shell in
- They gain electrons and swell outward
How many shells do the atoms across period 3 have, Pia?
- Eight each
- Three each
- One more each step
Why do atoms get larger down a group, Ren?
- Each adds a new shell
- Their nuclei swell up in size
- Each loses protons
Why is potassium larger than sodium, Tala?
- It has fewer protons inside
- It has one more shell
- It is a gas
In a larger atom, where are the outer electrons, Zee?
- Inside the nucleus
- Closer to the nucleus
- Farther from the nucleus