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C2 Crossword Part 2

Horizontales
Group 7.
The smallest number displayed next to the element symbol.
A subatomic particle found in the nucleus with a positive charge.
A model of atoms suggested by J.J Thomson.
A way to describe a substance using chemical symbols.
A compound which contains a small number of atoms joined together covalently.
The vertical columns in the periodic table.
Elements that form positive ions when in compounds.Most of these are good conductors,are hard and shiny.
The smallest particle of an element.
Verticales
A substance that increases the rate of a chemical reaction.
A table of chemical elements arranged in order of atomic number.
A charged atom.
A way to show a chemical reaction.
Chemicals consisting of a small number of covalently bonded atoms.
A substance that is practically unreactive so will not take part in reactions.
The total number of protons and neutrons in an atom.This is the largest number displayed next to the element.
This causes electrons to be arranged at different shells.
The middle of an atom made up of protons and neutrons.
When the charge is not evenly distributed in a molecule.