isotopes

Question 1

where is most of the mass in an atom stored

Answer 1

in the nucleus

Question 2

what does the top number on an element in the periodic table mean

Answer 2

mass number

Question 3

what does the bottom number on an element in the periodic table mean

Answer 3

atomic number - number of protons and therefore number of electrons too

Question 4

what are isotopes

Answer 4

atoms with the same number of protons but different numbers of neutrons, they therefore have different masses

Question 5

can different isotopes of the same element can have different physical properties

Answer 5

yes

Question 6

can ​different isotopes of the same element have the same chemical properties

Answer 6

yes, they always do. this is because their reactions depend on their electron structure which will remain the same

Question 7

what is the size of an atom

Answer 7

0.1 nm

Question 8

what property can isotopes have

Answer 8

be radioactive