Question

the periodic table
directions: use chapter 3 section 2 and the periodic notes to complete this worksheet.

1. list the atomic numbers of the elements in period 2.
2. list the symbols of the elements in period 2.
3. name the elements in period 2 that are metals.
4. name the elements in period 2 that are nonmetals.
5. which element in period 2 has the least mass?
6. which element in period 2 has the most mass?
7. to which group/family does each of these belong?

a. sulfur
b. sodium
c. argon
d. silicon
e. chlorine
f. phosphorus
the symbol for iron in fe. find iron on the periodic table.
a. what is the atomic number of iron?
b. to which period does iron belong?
c. to which group does iron belong?
name the elements that have many properties like iron.
using the periodic table
fill in the chart below. the first row has been completed as an example.

element	symbol	atomic number	period	group
	o
krypton
		79
			5	12
			4	7

Explanation:

1. Period 2 Elements: Period 2 includes elements with atomic numbers 3-10, from lithium to neon. Atomic mass increases left to right across a period.
2. Element Groups/Families: Groups are vertical columns; elements in the same group share properties.
3. Iron (Fe): Found in the transition metals section of the periodic table.
4. Table Completion: Uses standard periodic table data to fill in missing element details.

Answer:

1. 3, 4, 5, 6, 7, 8, 9, 10
2. Li, Be, B, C, N, O, F, Ne
3. Lithium (Li), Beryllium (Be)
4. Boron (B), Carbon (C), Nitrogen (N), Oxygen (O), Fluorine (F), Neon (Ne)
5. Lithium (Li)
6. Neon (Ne)
7. A. Chalcogens (Group 16)

B. Alkali Metals (Group 1)
C. Noble Gases (Group 18)
D. Carbon Group (Group 14)
E. Halogens (Group 17)
F. Nitrogen Group (Group 15)

1. A. 26

B. Period 4
C. Group 8 (Transition Metals)
D. Examples: Nickel (Ni), Cobalt (Co), Ruthenium (Ru)

1. | Element | Symbol | Atomic Number | Period | Group |

Sodium	Na	11	3	1
Oxygen	O	8	2	16
Krypton	Kr	36	4	18
Gold	Au	79	6	11
Cadmium	Cd	48	5	12
Manganese	Mn	25	4	7