Periodicity Flashcards
1
Q
How are elements arranged in periodic table
A
In order of increasing atomic number.
2
Q
Periodicity
A
A repeating pattern of physical and chemical properties.
3
Q
1st Ionisation Energy
A
The energy needed to remove one mole of electrons from one mole of atoms in the gaseous state.
4
Q
Ionic radius across a period: Positive ions
A
Smaller than their atoms
-Same # of protons attracting fewer electrons = stronger attractions and stronger ionisation energy.
5
Q
Ionic radius across a period: Negative ions
A
Bigger than their atoms
-Same # if protons attracting more electrons = weaker attraction and weaker ionisation energy.
6
Q
Electronegativity
A
The power of an atom to attract the pair of electrons in a covalent bond.
