Chem periodic table

Question 1

Element

Answer 1

A substance that cannot be split into simpler substances by chemical means

Question 2

Triad

Answer 2

A group of 3 elements with similar chemical properties in which the relative atomic mass of the middle element is approx equal to the average of the other two

Question 3

Newlands octaves

Answer 3

Are arrangements of elements in which the first and eighth element counting from a particular element have similar properties

Question 4

Mendeleevs periodic law

Answer 4

When elements are place in order of relative atomic mass the properties of the elements recur periodically

Question 5

Atomic number

Answer 5

Number of protons in the neucleus of that atom

Question 6

Modern periodic table

Answer 6

Arranged in order of increasing atomic number

Question 7

Mass number

Answer 7

Sum of the number of protons and neutrons in the nucleus of an atom of that element

Question 8

Isotopes

Answer 8

Are atoms of the same element which have different mass numbers but same
atomic number

Question 9

Relative atomic mass

Answer 9

The average of the mass number of isotopes of an element taking their abundances into account relative to 1/12th of the mass of the carbon-12 isotope

Question 10

Electron configuration

Answer 10

Shows the arrangement of electrons in an atom of an element

Question 10

Principle of mass spectrometry

Answer 10

Is that charged particles moving in a magnetic field are deflected to different extents according to their masses and thus separated according to theses masses

Question 11

Hunds rule of maximum multiplicity

Answer 11

When two or more orbitals of equal energy are available the electrons occupy them singly before filling in pairs

Question 12

Paulis exclusion principle

Answer 12

No more than two electrons may occupy and orbital and they must have opposite spin