G8 Chemistry so far

Question 1

The number 6 ( coefficient) in the chemical formula stands for

Accepted Answer

The number of water ( H2O) molecules

Question 2

An example of a polyatomic ion is

Accepted Answer

OH-

Question 3

In the given formula - the Subscript 2 stands for

Accepted Answer

Number of Hydrogen atom

Question 4

What does a particle diagram of an equation show

Accepted Answer

the bondings involved, The number of atoms of each element, the different elements involved, Law of conservation of mass

Question 5

The atoms react because

Accepted Answer

They want a full outer shell

Question 6

The Chemical formula C6H12O6 has which all elements

Accepted Answer

Carbon , Oxygen, Hydrogen

Question 7

Sign of chemical reaction is

Accepted Answer

colour change, smoke/ bubbles given out, temp difference, Precipitate formed

Question 8

When bonding between atoms happens due to 'sharing' of electron we call it

Accepted Answer

Covalent bonding

Question 9

The chemical formula for Calcium Bromide will be

Accepted Answer

CaBr2

Question 10

The ion formed by Mg is

Accepted Answer

Mg2+

Question 11

How are you finding chemistry so far

Accepted Answer

Interesting, Challenging, I am cracking it !, I hate chemistry !!!

Question 12

The ion formed by Na is

Accepted Answer

Na+

Question 13

The correct formula for sodium Chloride will be

Accepted Answer

NaCl

Question 14

The correct formula for Magnesium Chloride will be

Accepted Answer

MgCl2

Question 15

An example of chemical change is

Accepted Answer

hard boiling an egg

Question 16

The chemical formula C6H12O6 has how many atoms

Accepted Answer

24

Question 17

The ion formed by Chlorine is

Accepted Answer

Cl-

Question 18

The correct formula for Calcium hydroxide will be

Accepted Answer

Ca(OH)2

Question 19

A neutral atom means

Accepted Answer

The number of electrons and Protons are same

Question 20

When a positive and negative ion bond - we call it

Accepted Answer

Ionic bonding

Questions 20