Atoms, compounds and Isotopes Flashcards
What other 3 particles do atoms contain?
Protons.
Neutrons.
Electrons.
What 2 things describe an atom?
Atomic number.
Mass number.
What does the atomic and mass number tell us?
How many of each kind of particles an atom has.
What is the mass number?
Total number of protons and neutrons.
What is the atomic number?
Number of protons.
Atoms of the same element all have the same what?
Same number of protons.
Atoms of different elements have different what?
Different number of protons.
How do you get the number of neutrons?
Subtract the atomic number from the mass number.
Why aren’t electrons counted in the mass number?
Relative mass is very small.
Compounds are what?
Chemically bonded.
How are compounds formed?
When atoms of two or more elements are chemically combined together.
Carbon dioxide is a compound formed from a chemical reaction between what?
Carbon.
Oxygen.
Isotopes are the same expect…
For an extra neutron or two.
Define the word isotope
Different atomic forms of the same element , which have the same number of protons but different number of neutrons.
Isotopes must have the same…
Same atomic number.
