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Chem
Question | Answer |
---|---|
Biomagnification | increase in concentration of harmful substance at each link in the food chain as one animal eats many contaminated animals |
Bioaccumulation | gradual build up of chemicals in an organisms body |
3 States of Matter | Solid, Liquid, and Gas |
Difference between Physical and Chemical properties of Matter | Physical properties are properties that do not change the nature of matter.Chemical properties are properties that do change the nature of matter.Physical changes are reversible. |
Define Malleability | It is the ability of a solid to bend or be hammered into other shapes without breaking |
Define Ductility | Capable of being drawn out into wire or threads, as gold. |
Define Lustre | eflected light; sheen; gloss |
Define Combustibility | Capable of catching fire and burning; inflammable; flammable: |
Difference between element and compound | An element is a single substance. A compound consists of two or more of these elements. |
Atom | the smallest component of an element |
Molecules | . the smallest physical unit of an element or compound, consisting of one or more like atoms in an element and two or more different atoms in a compound. |
Element | A chemical element is a substance that cannot be broken down by chemical means. |
Alkali metals | The alkali metals, found in group 1 of the periodic table , are very reactive metals that do not occur freely in nature |
Alkaline Earth Metals | any of the divalent strongly basic metals of group II of the periodic table |
Halogens | group 17 |
Noble Gases | group 18 |
Isotope | any of two or more forms of a chemical element, having the same number of protons in the nucleus, or the same atomic number, but having different numbers of neutrons |