Mod 3.1 Flashcards
(19 cards)
What is an element?
An element is a substance which cannot be reduced to a simpler substance by chemical means.
What is the smallest particle of an element that retains the characteristics of said element?
An atom.
What does an elements ‘atomic number’ refer to?
The number of protons in the nuclei of its atom.
The atoms of each element are made up of electrons, protons and neutrons, which are known as as?
Subatomic particles.
The fourth, or (N) shell of a atom, can hold a maximum of;
32 electrons.
An electron carries a…?
A negative charge.
A proton carries a…?
A positive charge.
(P for positive)
A neutron carries a…?
No charge
(Neutral)
An atoms outer shell is known as its…?
Valence shell.
When atoms steal electrons from others to fill its outer shell, this is known as…?
Ionic bonding.
Metallic bonding is..?
A type of chemical bonding that comes from the electrostatic attractive force between conduction electrons and positively charged metal ions.
Covalent bonding is?
Where atoms agree to share electrons in order to fulfill a mutual need to maximise their capacities
A positive ion is one that…
Is one that has a shortage of electrons
A negative ion is one that…
That has had electrons added to it.
Ionisation is…?
The process by which an atom gains or losses an electron.
Ionisation is…?
The process by which an atom gains or losses an electron.
In relation to their valence shell, Conductors usually have…
3 or less valence electrons
(Low resistance)
In relation to their valence shell, Semiconductors usually have…..
Four valence electrons.
(Mid-range resistance)
In relation to their valence shell, insulators have….
5 or more valence electrons
(High resistance)
