C4.2 Flashcards
Relative mass of proton
1 hydrogen atom
Relative mass of electron
Almost zero
Relative mass of neutron
1 hydrogen atom
Protons in an electron found by:
Proton no.
Electrons in an atom found by:
Same as proton (proton number)
Neutrons in an atom found by:
Relative atomic mass - proton number
Why do group 1 elements tend to form 1+ ions
More likely to lose an electron (negative)
so has more protons in a nucleus than electrons outside
Protons give it a 1+ charge
Why do group 7 elements tend to form a 1- charge?
More likely to gain 1 electron than lose any from another atom
Gains electron,therefore gains 1 negative charge
Where is an electron in a helium atom?
In orbit of the atom
Where are the protons and neutrons in a helium atom?
In the nucleus
All the atoms of the same element have the same what?
Number of protons
Elements in the periodic table are arranged in order of what?
Proton number
The light emitted from a particular element gives what?
A characteristic line spectrum
The study of what has helped chemists to study what?
Spectra
Discover new elements
The discovery of some elements depended on what? And example
The development of new practical techniques for example spectroscopy
If an element is in group 6, how many electrons will they have on their outer shell
6
The further away the outer shell becomes….
The weaker the attraction is,so the less reactive it is
Why is Florine more reactive than chlorine?
It’s outer shell is closer to the nucleus
Group 7 elements want to ______ an electron, this is easier the higher up the table they are. Why?
Because it’s closer to the positive charges
For group 1 elements,it is easier to ____ an electron when the electron is what? Why?
Further away from the nucleus,because there is less of a bond
Why do group 1 elements react with group 7 elements so violently?
Group 1 wants to try to lose 1 electron,group 7 wants to gain an electron- both help to gain a full outer shell
