Atomic structure

Question 1

how large is an electron

Answer 1

appox. 1800x smaller than a proton or neutron

Question 2

How big is a nucleus

Answer 2

10000-100000 x smaller than the space occupoed by the cloud of electrons

Question 3

electrostatic connection

Answer 3

how negative particles attract positive particles

Question 4

What causes electrons to stay in an atom

Answer 4

they are bound to the nucleus by the electrostatic connection between themselves and the protons

Question 5

What is the density of the nucleus

Answer 5

approx 10000-1000x smaller than the size of the atom by 99.97% of the atoms mass, extremley dense

Question 6

what are the protons and neutrons referred to collectively

Answer 6

nucleons

Question 7

What are chemical symbols always made up of

Answer 7

One of two letters, the first is always and if there is a second it is lowercase

Question 8

what symbol represnts the atomic number

Answer 8

z

Question 9

what symbol represents the atomic mass

Answer 9

A

Question 10

what symbol represents the chemical symbol

Answer 10

X

Question 11

what is nuclide nottation

Answer 11

a standard way of representing an atom, showing its atomic number (bottom left) and mass (top left)

Question 12

What are isotopes

Answer 12

Atoms of the same element (same atomic number) but a different mass number (same number of protons/electrons but different number of neutrons)

Question 13

what is shared between isotopes and what differs

Answer 13

they have identical chemical properties but different physical properties (density and mass), some isotopes are also radioactive

Question 14

what does radioactive mean

Answer 14

the nucleus of the atom is not stable and will break down spontaneously into a more stable form by emitting particles are radiation