Rank the following elements in order of increasing atomic size sodium, hydrogen, carbon and beryllium

1: Carbon 70 pm

2: Hydrogen 120 pm

3: Berylilium 153 pm

4: Sodium, 227 pm

Explanation:

Hope this will help!

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles

b) nuclear ive learned that in a pedtrodic table