Atoms Flashcards
What charge do neutrons have?
Neutral
What charge do electrons have?
Negative
What charge do protons have?
Positive
What is the atomic proton number?
It tells us the number of electrons and protons in the element
What is the atomic number?
The number of protons added to the number of neutrons
How many electrons can go in each shell?
In the inner shell only two can fit in but in the rest of the shells 8 electrons can fit in
What is an ion?
An ion is a charged particle, it is an atom that has lost or gained electrons
What does independent value mean?
The independent value is the thing that you change to see how it affects the experiment
What is the dependant variable?
The dependant variable is the thing that must be changes as a result of the independent variable being changed
True or false, elements in the same group in the periodic table dont always have the same amount of electrons
False
What are the atoms in group 0?
These are called noble gases as they have stable arrangements of electrons and their shells are always full
What are all substances made of?
All substances are made of atoms, a substance that is made of only on sort of atom is called an element. These are shown in the periodic table of elements.
How many elements are there in the periodic table?
118
What are atoms of elements represented by?
Symbols eg, O - Oxygen and Na - Sodium
True or false, the number of protons in an atom is the same as the number of electrons?
True
How do you get the atomic mass number of an element?
You add the number of protons to neutrons
If there was an element in group 3 how many electrons would it have?
5, two in the inner shell and three in the outer shell but all the electrons that dont fill up a shell determine what group the element is in
What happens when elements react?
When elements react their atoms join together with other atoms to form compounds, this involves giving, taking or sharing electrons to form ions or molecules
How do non metals become positive ion’s?
They loose electrons
How do non metals become negative ion’s?
By gaining electrons
What do ion’s always have?
A full outer shell
What do compounds formed from non metals consist of?
molecules in which the atoms are held together with covalent bonds
Are atoms lost during a chemical reaction
No
