Year 10 Mid Topic Flashcards
(80 cards)
How do you find the amount of neutrons in an atom?
Mass number subtract protons
What is the mass number?
Protons and neutrons
How do you tell an atom is neutral?
Neutral atoms have same number of protons and electrons
What is an isotope?
An isotope is an atom which has gained or lost electrons in its outer shell
Xe
Xenon
Be
Beryllium
Ne
Neon
Pb
Lead
Xenon
Xe
Beryllium
Be
Neon
Ne
Lead
Pb
W
Tungsten
Tungsten
W
How many electrons in the 1st shell?
2
How many electrons in the 2nd shell?
8
How many electrons in the 3rd shell?
18
How many electrons in the 4th shell?
32
How many electrons in the 5th shell?
50
What charge is an isotope if it loses an atom?
Positive
What charge is an isotope if it gains an atom?
Negative
What is the valence shell?
Outer shell
What is a covalent bond?
When 2 atoms or more ‘share’ their electrons so other atoms also have a full shell
What is an ionic bond?
When an atom ‘borrows’ or ‘gives away’ electron/a to another atom so they have a full shell