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Science

Teacher: Debra Jenkins
Across
This is the basic building block of all matter.
This is the unit used to measure the mass of subatomic particles.
Area outside the atomic nucleus where the probability of finding electrons high. The cloud model emphasizes the electron is not in a fixed orbit or distance from the nucleus center.
This is a method used to identify the number and location of electrons for particular atoms.
Atoms of the same element with varying numbers of neutrons.
This is a group of protons and neutrons in the center of all atoms.
The possible state for an electron of an atom that is proportional to its distance to the nucleus.
Down
Number of protons and neutrons
This is a subatomic particle with a negative charge and very little mass
This is a substance that cannot be broken down further by chemical means.
This is a subatomic particle with no charge and a mass of 1 amu
This is the a measure of quantity of matter.
This is the weighted average of all of the isotopes of an elements
This is the number of protons
This is a subatomic particle with a positive charge and a mass of 1 amu
An atomic model showing a small positively charges nucleus with electrons at different energy levels