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Periodic Table
Atom Building
Forces
100
How many elements are on the periodic table?
There are 115 elements on the periodic table.
100
What is an atom?
An atom is the basic unit of a chemical element.
100
Do two positively charged atoms repel or attract?
Two Positively charged atoms repel.
200
Is the atomic number below or above the element symbol on the periodic table?
The atomic number is below the element symbol.
200
How do you find the charge of an atom?
To find the total charge of an atom you multiply the number of particles by the charge of one particle.
200
What is the job of the electromagnetic force?
The electromagnetic force is responsible for holding the electrons in an atom in tact.
300
Which is more common in the periodic table, metals or non-metals?
Metals are more common in the periodic table.
300
When drawing an atom, what order do you fill up the energy levels?
When drawing an atom, you first fill up the center-most energy level, and work outward.
300
What does the word stable mean?
The word stable means the nucleus stays the same, not changing.
400
How do you find the mass number of an element?
To find the mass number of an element, you add the number of protons and neutrons.
400
How do you find the number of neutrons in an atom?
To find the number of neutrons you subtract the atomic number from the stable isotope number.
400
What is the strong nuclear force responsible for?
The strong nuclear force holds very close protons and protons, neutrons and neutrons, or protons and neutrons together in the nucleus.
500
What is the element symbol for iron?
The element symbol for iron is Fe.
500
What is sixth orbital you fill up while adding electrons?
?The sixth orbital is 4s.
500
What force between charges helps hold atoms together?
The attractive atomic force helps hold the atom together.