Isotopes

Question 1

Isotopes

Answer 1

Atoms of elements that have the same number of protons (atomic number) however different number of neutrons (mass number).

• Have identical chemical properties due to the number of electrons
• They have different physical properties

Question 2

Relative atomic mass

Answer 2

The weighted average mass of all isotopes in a give element.

(average mass of an atom compared to 1/12 of carbon 12)

Question 3

Relative atomic mass formula

Answer 3

Isotopic mass x abundance / 100

Question 4

Abundance

Answer 4

proportion of each isotope in a sample of the element.

Question 5

electron configuration and energy levels

Answer 5

1. electrons are as close to the nucleus as possible
2. electrons will occupy the inner shell then the outer shell
3. 2,8,8,2
4. electrons are in shells based on their energy levels

Question 6

Ions

Answer 6

Atoms that have an equal number of positive protons and negative electrons

Question 7

cation

Answer 7

positively charged ion

Question 8

anion

Answer 8

negatively charged ion

Question 9

Excited state

Answer 9

higher energy level

Question 10

absorption spectra

Answer 10

we can obtain an absorption spectrum by exposing an electron with white light at ground state

Question 11

emission spectra

Answer 11

1. electrons in an excited state are highly unstable and will fall back down to ground state. When electrons fall back down to ground state they emit a energy in the form of light, The different paths they fall in results in an emission spectrum

Question 12

continuous spectra

Answer 12

1. spectrum that contains all wavelengths of light within a given range with no gaps.
2. it appears to be smooth and unbroken range of colours such as the spectrum produced when white light passes through a spectrum