Question

directions: use a periodic table to find the information asked for below. 1. what is the atomic number of: calcium__ iron gold uranium 2. what is the atomic mass of: calcium iron uranium copper 3. how many protons do the following have? calcium gold copper iron 4. how many electrons do the following have? gold iron copper uranium 5. does mercury have more protons and electrons than tin? 6. is mercury a heavier element than tin? 7. does potassium have more electrons than neon? 8. does hydrogen have more electrons than uranium? 9. which has more protons, sulfur or iodine? 10. write the symbols or the names for each of these elements: chlorine zinc copper helium potassium iron silver p na ne sn mercury__

Explanation:

Step1: Find atomic numbers from periodic table

Calcium: 20, Iron: 26, Gold: 79, Uranium: 92

Step2: Find atomic masses from periodic table

Calcium: 40.08, Iron: 55.85, Uranium: 238.03, Copper: 63.55

Step3: Recall protons = atomic number

Calcium: 20, Gold: 79, Copper: 29, Iron: 26

Step4: Recall electrons = protons in neutral atom

Gold: 79, Iron: 26, Copper: 29, Uranium: 92

Step5: Compare protons/electrons of Mercury and Tin

Mercury (Hg) atomic number 80, Tin (Sn) atomic number 50. So yes.

Step6: Compare atomic masses of Mercury and Tin

Mercury atomic mass ~200.59, Tin atomic mass ~118.71. So yes.

Step7: Compare electrons of Potassium and Neon

Potassium (K) atomic number 19, Neon (Ne) atomic number 10. So yes.

Step8: Compare electrons of Hydrogen and Uranium

Hydrogen (H) atomic number 1, Uranium (U) atomic number 92. So no.

Step9: Compare protons of Sulfur and Iodine

Sulfur (S) atomic number 16, Iodine (I) atomic number 53. Iodine has more.

Step10: Write symbols/names

Chlorine: Cl, Copper: Cu, Potassium: K, Silver: Ag, Na: Sodium, Sn: Tin, Zn: Zinc, Helium: He, Iron: Fe, P: Phosphorus, Ne: Neon, Mercury: Hg

Answer:

1. Calcium: 20, Iron: 26, Gold: 79, Uranium: 92
2. Calcium: 40.08, Iron: 55.85, Uranium: 238.03, Copper: 63.55
3. Calcium: 20, Gold: 79, Copper: 29, Iron: 26
4. Gold: 79, Iron: 26, Copper: 29, Uranium: 92
5. Yes
6. Yes
7. Yes
8. No
9. Iodine
10. Chlorine: Cl, Copper: Cu, Potassium: K, Silver: Ag, Na: Sodium, Sn: Tin, Zn: Zinc, Helium: He, Iron: Fe, P: Phosphorus, Ne: Neon, Mercury: Hg