C - The Periodic Table Flashcards
Atoms can be represented by …
Symbols
What’s the point of the periodic table?
It puts elements with similar properties together
Explain the significance of the properties being in groups?
The elements in that group all have similar properties
How are the elements in the periodic table grouped?
In vertical columns
What’s the zigzag in the middle of the periodic table?
It separates metals from non-metals
What part of the periodic table is the most reactive?
The fat left (group 1)
All elements in a GROUP have the SAME NUMBER of…
Electrons in their outer shell
The higher up the group that the element is in, the more ______ it is
Reactive
The top number of an element symbol is the …
Mass number
What does the mass number tell you?
The total number of protons and neutrons
The bottom number of an element symbol is the …
Atomic number
What does the atomic number tell you?
The number of protons, which is conveniently the number of electrons!
Is it neutrons, protons or electrons that make the shells of an atom?
Electrons
When plotting the electrons on the shells, what number on the element symbol do you look for?
The ATOMIC number. It tells you the protons and so it is also the amount of electrons
How do you find the number of neutrons in an atom?
You subtract the atomic number from the mass number
