Periodic table of elements
Charges
Subatomic
Numbers
Modern Theory
100
This is the smallest part of an element.
What is an atom?
100
Objects with the same charge do this when they come close to each other.
What is repel?
100
Three subatomic particles.
What are protons, neutrons, and electrons?
100
The sum of protons and neutrons in the nucleus of an atom.
What is mass number?
100
An atom is in this when all of its electrons have the lowest possible energies.
What is a ground state?
200

The rows in the periodic table are called __________?

What are "Periods!"

200
Objects with different charges do this when they come close to each other.
What is attract?
200
Located outside of the nucleus and have a negative charge.
What are electrons?
200
The number of protons in an atom of a certain element.
What is atomic number?
200

An atom is considered ____________  or _____________  when it wants to bond with other atoms. 

What is "Reactive  or "Unstable?"

300

The columns on the periodic table are called _________ or ___________?

What are "Groups" or "Families"!

300
When an atom gains an electron it has this kind of electrical charge.
What is negative?
300
Located inside of the nucleus and have a positive charge.
What are protons?
300
The atomic number of Oxygen.
What is 8?
300

Electrons are present in orbitals with an outermost orbital known as the ______________, which holds the highest energy.

What is a "valence shell" / "valence orbital"?

400

Elements are organized on the periodic table by ______________?

What is the "Atomic Number"!

400

Protons and neutrons are about the same size. True or False?

What is True?

400
Atoms of different elements have different numbers of these.
What are protons?
400
The mass number of Potassium.
What is 39.098?
400

The region of space around the nucleus where an electron is likely to be found.

What is a "cloud" or "orbital?

500

Elements which are present in the same column, have ______________  ______________?

What is a similar Property OR Similar Characteristics?

500
An atom that is neither positively or negatively charged.
What is neutral?
500
An atom with the same number of protons but different number of neutrons.
What is an isotope?
500
Mass number - atomic number = ______ __ ________.
What is the numer of neutrons?
500
Scientists use this to describe how electrons move around the nucleus.
What is the electron cloud model?
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