3.1 Periodic table arrangement - e configuratoion

Question 1

Period vs group

Answer 1

Period - Periodic table row

Groupd - Periodic table column

Question 2

Importance of the Periodic table

Answer 2

Classification of elements (Mendeleev 1869) - by atomic number

Question 3

List non-metals

Answer 3

1. Halogens (group 17) - very reacctive
2. Noble gases (group 18) - non-reactive
3. Other non-metals (S, C, N)

Question 4

Types of metals

Answer 4

1. Alkali metals (group 1) - very reactive
2. Lanthanoids (f block)
3. Actinoids (f block)
4. Other metals (Cu, Fe)

Question 5

Define metaloids

Answer 5

METALOIDS: elements which have both metal (physical) and non-metal (chemical) characteristics - are placed in Periodic table between metals and non-metals

Examples: Si, Ge, Po