Atoms flashcards

Question	Answer
Protons are...	heavy and positively charged
Neutrons are...	heavy and neutral
Electrons are...	tiny and negatively charged
The nucleus is...	-The middle of the atom -Positively charged because of the protons -TINY compared to rest of atom
What does the nucleus of an atom contain?	Protons (positive) and neutrons (negative)
Almost the whole mass of the atom is...	concentrated in the nucleus
Particle- Proton	Relative mass- 1 Charge- +1
Particle- Neutron	Relative mass-1 Charge- 0
Particle-Electron	Relative mass-0.0005 Charge- -1
Neutral atoms have...	no charge overall.
The charge on the electrons is the same size as...	the charge on the protons- but opposite
The number of protons always equals the...	number of electrons in a neutral atom
If some electrons are added or removed...	the atom becomes charged and is then an ion
The number of neutrons isn't fixed but is usually about...	the same as the number of protons
Its the number of protons in an atom that decided what element it is...	e.g- any atom of the element helium will have 2 protons and any atom with 2 protons is helium
Atoms of the same element all have the same number of protons...	- and atoms of different elements will have different numbers of protons
Elements all have...	different properties from each other due to differences in their atomic structure

Resource summary

	Created by caitlinjardine almost 11 years ago