Question

Which type of atom has the same atomic number but different mass numbers?

compounds
ions
isotopes
radicals

Answer 1

isotopes

Answer 2

thank you can you help me with other one?

Answer 3

Silicon has three naturally occurring isotopes. Silicon-28 has a mass of 27.98 and a relative abundance of 92.23%. Silicon-29 has a mass of 28.98 and a relative abundance of 4.68%. Silicon-30 has a mass of 29.97 and a relative abundance of 3.09%. What is the weighted average atomic mass of silicon?

27.99 g/mol
28.09 g/mol
28.98 g/mol
29.00 g/mol
I really don't understand is there a certain formula to use?

Answer 4

no there isnts, ita actually very simple to do this

Answer 5

how do you solve it?

Answer 6

divide the percentages of the isotopes by 100, then multiply them by their atomic number and add them all up to find the abundance.
(28x0.9223)+(29x0.0468)+(30x0.0309)=28.10 relative abudance

Answer 7

and for the average atomic weight you add them all up and divide by four

Answer 8

do you get it?

Answer 9

wait let me solve it

Answer 10

@GAzela1997 is it B??

Answer 11

for?

Answer 12

i mean for the answer

Answer 13

for this question?

Answer 14

yes

Answer 15

c

Answer 16

ions are elements that have been in a reaction

Answer 17

the difference between isotopes is that they have the same number of protons in the nucleus but different number of nutrons

Answer 18

oooo

Answer 19

medal pls :D

Answer 20

thanks you!

Answer 21

the periodic table is numbered elements for how many protons it has in the nucleous

Answer 22

yeah