Question

Atomic masses of which elements must be memorized?

Answer 1

atomic masses upto 16 u can memorize very easily bcoz they all are double of thethier atomic no :)
example Nitrogen -atomic no is 7 and atomic mass is14
silicon atomic no is 14 and atomic mass is 28
but after 16 they will very by one unit ant then by two to three units

Answer 2

But atomic mass of Li is 7

Answer 3

yaa one exception case :)

Answer 4

Be too :)

Answer 5

its not exactly but you can remember in this way:)

Answer 6

I memorized series wise..
Like
Hydrogen
helium
lithium
berelium
boron
That was pretty easy ..

Answer 7

she is asking atomic mass and not atomic number @Ryaan

Answer 8

I know but I'm telling my procedure of memorizing both..:P

Answer 9

ok fine dude :)

Answer 10

http://www.youtube.com/watch?v=uJGrwWOWt3Q
LOL just have it :)

Answer 11

The video was good but I already know the first 20 elements. I just wanted to know apart from the first 20 elements whose masses should I memorise.
Which elements are seen most commonly in chemical reactions?

Answer 12

Chlorine, silver, iron, sulphur I see those a lot.

Answer 13

upto 30 u should memorize they all are important

Answer 14

How can I memorize them ?

Answer 15

You soon will I mean after solving a few problems I remember them just like that. I guess keep working and you'll remember them :)

Answer 16

But are you allowed to use a periodic table for your tests?

Answer 17

yaaa me to thinking the same :) its allowed :)

Answer 18

No. But sometimes we are given atomic masses for very rarely used elements like Xenon and Ruthenium. You are expected to memorize all other frequently used elements.
Trouble is I don't know what exactly those elements are.

Answer 19

Come on Openstudy daily and solves others problem :P You'll memorize everything so fast believe me..

Answer 20

Where can we solve questions in openstudy? I thought that it was a question answer site..

Answer 21

There is a very long list of elements even though they are common, like Ryaan said solving problems will help you remember easily instead of memorising them all one by one which is a bit time consuming.

Answer 22

This is also 'each one teach one' site...

Answer 23

Can each one make up many many questions to teach one?

Answer 24

lol..I jus gave an example..what you get?

Answer 25

Which books should I practise problems from?

Answer 26

You don't have your 'Chemistry book' ?

Answer 27

I have already solved the questions from that... so now I have run out of problems.

Answer 28

What grade?

Answer 29

11th

Answer 30

ryaan ur in which grade:)

Answer 31

lol I'm in grade 9th so I don't have an idea what problem or what chapter you would have..

Answer 32

LOL

Answer 33

http://www.gobookee.net/chemistry-numerical-problems-best-class-11/
I googled and found this...check

Answer 34

@Tushi you could get extra handouts from your teacher maybe?

Answer 35

There are no questions in gobookee... only the syllabus is there :(

Answer 36

Memorize the organic s such as carbon, hydrogen, oxygen, nitrogen, and of course a few other inorganic such as phosphorus, and sulfur

Answer 37

What about magnesium and aluminium ? They are always asked in questions (present in reactions) and I always forget them.

Answer 38

To be honest, you don't need to memorize any mass for any atom. It's pointless. every great chemist has access to a periodic table easily. Also, calculating masses is not something a chemist does everyday, unless you're an analytical chemist, then maybe you might. Just be familiar with the atomic size and how the mass increases as you move down the periodic table.

Answer 39

At my highschool, we had to know the most common used elements in HS chemistry.

- Hydrogen (1)
- Carbon (12)
- Nitrogen (14)
- Oxygen (16)
- Sodium (23)
- Phosphorus (31)
- Sulfur (32)
- Chlorine (35.5)
- Potassium (39)

Answer 40

Don't bother memorizing them people! You're always given a periodic table for almost all courses after general chemistry I.

There's far more important and interesting things to memorize than a bunch of masses for elements.

Answer 41

True. In HS, we found it much more interesting to know which elements/compounds you had to combine in order to create (smoke) bombs. \(\Huge\ddot\smile\)

Answer 42

Tushi, I agree with Abbot. Memorizing atomic masses - after the first say 10 elements - is not really very helpful.