Ch4 Periodic Table

Question 1

Triad

Answer 1

Group of three elements with similar properties in which the atomic weight of the middle element is approximately equal to the average of the other two

Question 2

New lands octaves

Answer 2

Arrangements of elements in which the first and the 8th element counting from a particular element have similar properties

Question 3

Mendeleevs periodic table characteristics

Answer 3

Placed all elements with similar properties in the same column
Left gaps
Predicted discovery of some elements
Reversed order of some elements

Question 4

Atomic number

Answer 4

The number of protons in the nucleus of that atom

Question 5

Modern periodic table

Answer 5

An arrangement of elements in order of increasing atomic number

Question 6

Mendeleevs periodic law

Answer 6

When elements are arranged in order of increasing atomic weight the properties of the elements recur periodically

Question 7

Modern periodic law

Answer 7

When elements are arranged in order of increasing atomic number the properties of the elements recur periodically

Question 8

Modern periodic table characteristics

Answer 8

Elements arranged in order of increasing atomic number
Over 100 elements
No gaps

Question 9

Mass number

Answer 9

An element is the sum of the number of protons and neutrons in the nucleus of an atom of that element

Question 10

Isotope

Answer 10

Atoms of the same element which have different mass numbers due to the different number of neutrons in the nucleus

Question 11

Relative atomic mass

Answer 11

The average of the mass numbers if the isotopes of the element as they occur naturally taking their abundances into account and compared to 1/12 of a carbon 12 isotope

Question 12

Principle of mass spectrometry

Answer 12

Charged particles moving in a magnetic field are deflected to different extents according to their masses and are this separated according to these masses

Question 13

Mass spectrometer process

Answer 13

Vaporisation 
Ionisation
Acceleration
Separation in a magnetic field
Detection

Question 14

Aufbau principle

Answer 14

When building up the electron configuration of an atom in its ground state the electrons occupy the lowest available energy levels

Question 15

Hunds rule of maximum multiplicity

Answer 15

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

Question 16

Pauli exclusion principle

Answer 16

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

Question 17

Element

Answer 17

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