periodic table

Question 1

how are elements arranged in the periodic table

Answer 1

in order of their atomic number
in groups and periods

Question 2

The electronic configuration

Answer 2

The electronic configuration of an element tells us how its electrons are arranged.
• The number of shells corresponds to the period number.
• The number of outer electrons corresponds to the group number (except for transition metals).
• Example: Sodium (Na) is in Group 1 and Period 3. Its configuration is 2,8,1

Question 3

how to use electrical conductivity and the acid base character of oxide to see if it is a mental or non metal

Answer 3

Metals conduct electricity, while non-metals generally do not.
• Metal oxides are basic (react with acids), while non-metal oxides are acidic (react with bases)

Question 4

identify an element as a metal or a non metal according to its position in the periodic table.

Answer 4

Metals are found on the left side of the periodic table, and non-metals on the right.
• The dividing line is a diagonal staircase starting from Boron (B) to Astatine (At)

Question 5

how the electronic configuration of a main group element is related to its position in the periodic table

Answer 5

The electronic configuration of an element determines its group and period position.
• Example: Oxygen (O) has the configuration 2,6, meaning it is in Group 6 and Period 2

Question 6

understand why element in the same group of the periodic table have similar chemical properties

Answer 6

Elements in the same group have similar chemical properties because they have the same number of valence electrons

Question 7

understand why noble gases don’t react easing

Answer 7

Elements in the same group have similar chemical properties because they have the same number of valence electrons

Question 9

test for oxygen gas

Answer 9

insert a glowing splint. if the splint relights the gas is oxygen