Flashcards
Chemistry - Unit Test
Cards in this deck (11)
- 1What is an ion?An atom that has either a positive or negative charge.
- 2What is a cation?An ion with a positive charge
- 3What is an anion?An ion with a negative charge.
- 4What is an isotope?An atom with the same number of protons but different number of neutrons.
- 5What is a valence shell and valence electrons?A valence shell is the last energy shell on an atom. Valence electrons are the electrons on the last shell of the atom.
- 6Where is most of the weight in an atom?In the nucleus.
- 7Who created the periodic table and how?_______ created the periodic table. He created it by placing atoms with similar properties near each other.
- 8How do you calculate the number of protons, neutrons, and electrons in an atom?The number of protons is the same as the atomic number. The number of electrons equals the number of protons. The number of electrons is the atomic mass (rounded)-the atomic number.
- 9Where are the alkali metals, alkaline earth metals, halogens, and noble gases on the periodic table?The alkali metals are in the first group on the periodic table. The alkaline earth metals are in the second group. The halogens are in the 17th group. The noble gases are in the 18th group (the only stable gases)
- 10DEFINE: - Chemical Family - Groups - PeriodsA chemical family is a column of elements with the same properties. Groups are the columns on the periodic table. Periods are the rows on the periodic table.
- 11Define Chemical Property.The ability for a chemical to react and form a new substance.
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- Flashcards on Chemistry - Unit Test, created by jiyafsaeed on 21/10/2015.
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