Activity 2: Investigate the Periodic Table

Here are the answers for Activity 2, investigating the Periodic Table.

Activity 2: Investigate the Periodic Table

1. Questions about the symbol in Figure 4:

• 1.a) What is the name of this element? The symbol 'C' represents Carbon.

• 1.b) What is its atomic number? The atomic number is the top left number, which is 6.

• 1.c) Write down the name of an element in the same group as this element. Carbon is in Group 14. An element in the same group is Silicon.

• 1.d) Write down the name of an element in the same period as this element. Carbon is in Period 2. An element in the same period is Nitrogen.

2. Complete the table for the first 20 elements:

Element name	Symbol
Hydrogen	H
Helium	He
Lithium	Li
Beryllium	Be
Boron	B
Carbon	C
Nitrogen	N
Oxygen	O
Fluorine	F
Neon	Ne
Sodium	Na
Magnesium	Mg
Aluminum	Al
Silicon	Si
Phosphorus	P
Sulfur	S
Chlorine	Cl
Argon	Ar
Potassium	K
Calcium	Ca