Atoms: Info dump Flashcards
3 sub-atomic particles in an atom
Proton, Electron, Neutron
Relative masses of a proton
1
Relative mass of a neutron
1
Relative mass of an electron
1/1840
Charge of a proton
+1
Charge of an electron
-1
Charge of a neutron
0
Smallest particle in an atom
Electron
The particle that the mass of an atom is majorly based on
Nucleus
Neutron + Proton
Nucleus
The equation to find the capacity of a shell
2n^2 (n = number of sides)
Order of shells
K, L, M, N
The capacity of each shell
2, 8, 18, 32
Nucleon number = ?
Sum of proton and neutron particles
Another name for Nucleon number
Mass number
Atomic number = ?
Numbers of proton particles/electron particles in an atom (if atom = neutral)
Order of sub-shells
s, p, d, f
Capacity of sub-shells
2, 6, 10, 14
Explain Isotopes
Atoms of the same element that have different numbers of neutrons
What is a ‘Trend’?
A pattern of changes happened to the elements in a group or a period, all in order
Another name for Group 1 elements
Alkaline metals
Group 1 elements are ___ than other metals.
softer
Group 1 elements have ___ melting points compared to the other metal groups.
low
Products after Group 1 elements reacting with Water
Hydrogen, Metal + hydroxide
What solution is formed when Group 1 elements react with water?
Alkaline solution
Products after Group 1 elements reacting with Oxygen
Metal + oxide
Properties of a Group 1 element
Shiny when freshly cut,
Can conduct electricity and heat
Trends in Group 1 elements
Melting points decreases as it goes down the group,
Elements get exciting, reacting with water as it goes down til the bottom
Group 2 elements are also known as ___.
Alkaline Earth metals
Properties of Group 2 elements
Can be found on earth,
Can form an alkaline solution after reacting with water,
Can conduct electricity and heat
Trends in Group 2 elements
Boiling and melting points increase as it goes down the group
The elements get more exciting reacting with water and acid, as they descend to the bottom of Group 2
What are Group 7 elements also known as?
Halogens (Deadly elements)
- Salt-forming elements
Halogens are ___.
Non-metals
What can’t halogens do?
Conduct electricity and heat
Trend in Group 7 elements
Boiling and melting points increase from top to bottom,
Reactions get less exciting, going down the group
Results from halogens in a combustion reaction
Poisonous and toxic gas
Horizontal Rows
Periods
Vertical Columns
Groups
Trend occurring in Periods 1 and 2
Boiling and melting point increase in the first 4 elements,
The remaining elements’ boiling and melting points rapidly decrease
Elements on the left side of the table are ___.
Elements on the right side of the table are ___.
metals, non-metals