L1 Chemistry Flashcards
1
Q
Isotope
A
Atoms with the same number of protons but different number of neutrons
2
Q
Which isotope is more radioactive? more neutrons or less neutrons?
A
more neutrons
3
Q
Elements in the same row have their electrons in the same shell therefore…
A
They have similar sizes
4
Q
Elements in the sake column have the same number of electrons in their outermost shell therefore…
A
They have similar chemical properties
5
Q
Covalent bond
A
- a bond made up of 2 electrons
- the 2 electrons are shared, i.e. one comes from each atom
6
Q
Molecules are formed by what bonds?
A
covalent bonds
7
Q
non polar covalent bond
A
electrons are equally distributed
8
Q
polar covalent bond
A
electrons are not equally distributed
9
Q
electronegativity (def)
A
the measure of how strongly electrons are attracted to the nucleus
10
Q
what type of bond is the hydrogen bond?
A
a polar covalent bond
