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Atoms and molecules

helps people learn the atoms and moecules

The bonding that happens when atoms share pairs of electron covalent bond
substance with only one kind of atom element
classification system of elements periodic table of elements
an atom that gains or loses electrons an ion
smallest piece of an element an atom
atom smashing machine particle accelator
a group of atoms joined together chemically molecules
what is chemistry the study of? Matter
What is the approximate number of the atomic mass? protons and neutrons
Electrons travel around the nucleus of an atom in a space called what? shell
the atomic number is based on the number of what an element has? protons
Who is the russian chemist who is responsible for developing a way to organize elements? Mendeleev
What theory is what scientist think about atoms? atomic
What makes it easier for scientist from all over the world to communicate about elements? Chemical symbols
What is the combination of gases hydrogen and oxygen make? Water
In the periodic table of elements, the name of the element, its chemical symbol, and what else can be found? atomic number
coumpounds are molecules,but are molecules always compounds? No
Why do scientist use chemical symbols? It is quicker and easier to write.



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