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8th Chemistry

Across
Elements with the properties of Metals and Non metals, often used as semiconductors because they conduct electricity less well than metals.
The name of the outermost electrons involved in chemical bonding.
The same as the number of protons in the Nucleus. This is what makes one element unique from another.
Two or more atoms bonded together. Can be same element or different elements.
Two or more elements bonded together in a molecule.
A change that does not result in a new substance being formed. For example ice melting into liquid water or being boiled into steam.
Atoms of the same element, but different atomic weights due to their differing numbers of neutrons.
The Russian physicist who invented the Periodic table.
Covalent bond in which the electrons are shared unequally
Neutral particle found in the Nucleus.
A bond between two ionized atoms, in which one atom has ripped an electron off of the other, causing one to be positively charged and the other negatively.
A chart that organizes the elements by their properties.
Most elements are are classified as these. Often shiny, and good conductors of heat and electricity.
High ph substance that tastes bitter and turns litmus paper blue.
Down
An average of the number of Protons and Neutrons weighted by relative frequency.
Negatively charged particle found in a "cloud" far from the nucleus.
The one or two letters that represent an element on the Periodic table.
The substance or substances that result after a chemical reaction.
A change that results in products with new properties like Sodium metal and Chlorine gas combining to make table salt.
When to bonded atoms share electrons.
The substances that react together at the beginning of a chemical reaction.
Positively Charged Particle in the Nucleus.
The ease and speed that an element reacts chemically. This decreases from left to right across the periodic table.
Chemical formula of table salt. Sodium + Chlorine.
The vertical columns of the Periodic table.
The horizontal rows of the periodic table.
Low ph substance that tastes bitter and turns litmus paper red.