Atoms Notes Flashcards
What are atoms made out of?
Protons, neutrons and electrons
What are protons?
Protons are positive charges found in the nucleus, approximately equal to the mass of a neutron
What is a neutron?
Neutrons have no electric charge, are found in the nucleus, heavy and have deep penetration into matter
What are electrons?
Electrons are negatively charged particles found outside the nucleus, weigh less than the neutron and proton and have shallow penetration into matter
What is most of an atoms volume made out of?
Empty space
Draw a diagram of an atom?
Do it in ur book andy
What is the atomic number?
Number of protons
When is an atom electrically neutral?
When the number of positively and negatively charged particles are equal and electrons and protons are equal
Why is a nucleus with six protons and no neutrons unstable?
Because all the like charges are trying to repel away from each other
What are atoms of the same element with different mass numbers called?
Isotopes
Draw a diagram of an isotope?
Do it in ur book andy
What happens when you remove one neutron from an atom of nitrogen?
Its mass number will decrease by one and it will become a different isotope of nitrogen
What is the formula for finding the number of neutrons?
Mass Number minus Atomic Number
