Atomic Structure

Question 1

what are nucleons

Answer 1

protons and neutrons found in the nucleus

Question 2

where are electrons found in an atom

Answer 2

around the nucleus in electron shells

Question 3

what is the relative mass and charge of a proton

Answer 3

mass 1 charge +1

Question 4

what is the relative mass and charge of a neutron

Answer 4

mass 1 charge 0

Question 5

what is the relative mass and charge of an electron

Answer 5

mass 1/1840 charge -1

Question 6

why is an atom electrically neutral

Answer 6

number of protons equals number of electrons

Question 7

what does the atomic number represent

Answer 7

number of protons in the nucleus

Question 8

what does the mass number represent

Answer 8

total number of protons and neutrons

Question 9

how do you calculate the number of neutrons

Answer 9

mass number minus atomic number

Question 10

how is the full atomic symbol written

Answer 10

mass number on top atomic number below symbol on right

Question 11

in the periodic table what order of information is given

Answer 11

atomic number symbol name relative atomic mass

Question 12

how are electrons arranged in an atom

Answer 12

in shells around the nucleus starting from the innermost shell

Question 13

how many electrons can the first shell hold

Answer 13

2

Question 14

how many electrons can the second and third shells hold

Answer 14

8 each

Question 15

what is the valence shell

Answer 15

the outermost shell of an atom containing electrons

Question 16

what are valence electrons

Answer 16

electrons in the outermost shell

Question 17

what does electronic configuration show

Answer 17

arrangement of electrons in shells

Question 18

what is an isotope

Answer 18

atoms of the same element with same protons but different neutrons

Question 19

why do isotopes of the same element have the same chemical properties

Answer 19

they have the same number of electrons

Question 20

why do isotopes of the same element have different physical properties

Answer 20

they have different masses

Question 21

what is relative abundance

Answer 21

proportion of each isotope present in nature

Question 22

what does the sum of isotope abundances equal

Answer 22

100 percent

Question 23

what does relative atomic mass represent

Answer 23

weighted average mass of atoms accounting for isotopes and their relative abundances

Question 24

does relative atomic mass have units

Answer 24

no