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Topic 1: Atoms and the Periodic Table

Name: ____________________

  Date: ____________________
Across
A neutral group of two or more atoms held together by covalent bonds.
The sum of protons and neutrons in the nucleus of an atom.
The ease and speed with which an element combines, or reacts, with other elements and compounds.
A chemical bond formed when two atoms share electrons.
A reaction of an acid with abase, yielding a solution that is not as acidic or basic as the starting solutions were.
The basic particle from which all elements are made; the smallest particle of an element that has the properties of that element.
The attraction between ions with opposite charges.
The electrons that are in the highest energy level of an atom and that are involved in chemical bonding.
A substance that can conduct electric current under some conditions.
A substance made of two or more elements chemically combined in a specific ratio or proportion.
The central core of an atom, which contains protons and neutrons.
An ion that is made of more than one atom.
A small, positively-charged particle that is found in the nucleus of an atom.
A covalent bond in which electrons are shared equally.
An arrangement of the elements showing the repeating pattern of their properties.
The number of protons in the nucleus of an atom.
An atom with the same number of protons and a different number of neutrons from other atoms of the same element.
Down
The way a mineral reflects light from its surface.
An ionic compound made from the neutralization of an acid with a base.
A substance that tastes bitter, feels slippery, and turns red litmus paper blue.
A substance that tastes sour, reacts with metals and carbonates, and turns blue litmus paper red.
A one- or two-letter abbreviation for an element.
The average mass of all the isotopes of an element.
A term used to describe material that can be hammered or rolled into flat sheets.
An atom or group of atoms that has become electrically charged.
A horizontal row of elements in the periodic table.
A tiny, negatively-charged particle that moves around the outside of the nucleus of an atom.
A covalent bond in which electrons are shared unequally.
A small particle in the nucleus of the atom, with no electrical charge.
Elements in the same vertical column of the periodic table; also called family.