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chemistry

the chemical earth

QuestionAnswer
what is an ionic compound? a chemical compound in which ions are held together in a structure by electrostatic forces called ionic bonds.
what is a molecule? a group of two or more atoms held together by chemical bonds.
how is a molecule different from an ion molecules have no electrical charge
what is a compound? molecule made of atoms from different elements
cation atoms that have lost an electron(s) and are positively charged
anions atoms that have gained an electron(s) and are negatively charged
Gravimetric analysis a method for determining the quantity of a substance based on the mass of a solid. E.g a volume of water is filtered and the collected solids are weighed.
what is malubility? a material, most often a metal able to be hammed or pressed into shape without it breaking or cracking
What is ductility? a materials ability to be stretched into a wire
Atomic number the number of protons in the atomic nucleus
Mass number the number of protons and neutrons (together known as nucleons) in an atomic nucleus
What is a mixture? a material made up of two or more different substances which are mixed but not combined chemically
What is an covalent bond? a chemical bond that involves the sharing of electron pairs between atoms
What is a reliable experiment? one where significant results are consistant (the experiment must be repeatable)
What is validity? does the procedure of the experiment actually test the hypothesis that i want it to
electon is a subatomic particle with the symbol e- with a negative electric charge. It has no mass
proton is a subatomic particle with the symbol p+ with a positive electric charge
neutron is a subatomic particle with the symbol n0 with no net electric charge. it has a mass sightly larger then a proton
What is a nucleon? The collective term for protons and neutrons.
Do elements in the same group or period have similar reactivity? In groups.
Which elements (the name for them) are the most stable? The noble gases.
Which weighs less, an electron, proton or neutron? An electron: it has relatively no weight, and electrons and protons have a similar weight.
Created by: zclacko