Atom Parts
Periodic Table Parts
Metals
Nonmetals and Metalloids
Radioactive Elements
100
Negatively charged particles surrounding the atoms.
What are electrons?
100
The number of protons in an atom's nucleus.
What is atomic number?
100
An element in Group 1 of the periodic table.
What are Alkali Metals?
100
These elements have atoms to gain, lose, or share four electrons when reacting with other elements.
What is the Carbon Family?
100
The spontaneous emission of radiation by an unstable atomic nucleus.
What is radioactivity?
200
Rutherford found this central core of the atom.
What is the nucleus?
200
One- or Two-letter symbols that identify most elements.
What is the chemical symbol?
200
An element in Group 2 of the periodic table.
What are Alkaline Earth Metals?
200
These elements usually gain or share three electrons when reacting with other elements.
What is the Nitrogen Family?
200
This consists of two protons and two neutrons and is positively charged that decreases the atomic number by 2 and the atomic mass by 4.
What is an alpha particle?
300
Rutherford also found positively charged particles and named them this.
What are protons?
300
The average mass of all the isotopes of an element.
What is the atomic mass?
300
An element in Group 3 through 12 in the periodic table.
What are Transition Metals?
300
Elements that usually gain or share two electrons when reacting with other elements.
What is the Oxygen Family?
300
A fast-moving electron given off by a nucleus during radioactive decay that increases the atomic number of an element by 1.
What is a beta particle?
400
A small particle in the nucleus of the atom, with no electrical charge.
What are neutrons?
400
A horizontal row of elements in the periodic table.
What is a period?
400
Some of the elements in Groups 13 through 15 of the periodic table.
What are Metals in Mixed Groups?
400
These "salt forming" elements usually gain or share one electron when reacting with other elements.
What is the Halogen Family?
400
High-energy waves that have no charge and does not cause a change in the atomic mass or atomic number.
What is gamma radiation?
500
Atoms with the same number of protons and a different number of neutrons.
What are isotopes?
500
Elements in the same vertical column of the periodic table.
What is a group of family?
500
Elements that make up both of the bottom two rows of the periodic table.
What are Lanthanides and Actinides?
500
These elements do not ordinarily form compounds because they do not usually gain, lose, or share electrons.
What are the Noble Gases?
500
Radioactive isotopes that can be followed through the steps of a chemical reaction or process.
What are tracers?
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