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Physical Science Chapter 4 Test
Terms in this set (23)
the smallest part of an element that still has the properties of the element
an atom's central region which is made up of protons and neutrons
a subatomic particle that has a positive charge
a subatomic particle that has no charge
a subatomic particle that has a negative charge
the number of protons in the nucleus of an atom
the average mass of atoms (for one element) measured in atomic mass units (amu)
the sum of the number of protons and neutrons in the nucleus (rounded atomic mass)
an atom with the same number of protons as other atoms of the same element but has a different number of neutrons
regions where electrons are likely found
an electron that is found in the outer-most shell of an atom
Identify the 3 types of subatomic particles and the charge on each particle. Where is each subatomic particle located in the atom?
- Proton - in nucleus
- Neutron - in nucleus
- Electron - outside nucleus
Do atoms have an overall charge? Why or why not?
No, they have an equal number of protons and electrons so they are
What are the four different orbitals?
S, P, D, and F
Why are valence electrons important in atoms?
They are the electrons that are involved in chemical reactions and forming compounds.
Explain the structure of electrons in an atom using the following terms:
Electrons exist in different energy levels in an atom. Within each energy level, electrons exist in different orbitals. There are 4 different orbitals: s, p, d, and f.
Number of valence electrons in carbon
Number of valence electrons in helium
Number of valence electrons in potassium
Number of valence electrons in sulfur
Number of valence electrons in arsenic
Number of valence electrons in aluminum
Number of valence electrons in bromine
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