In the table below, there are descriptions of an experiment on samples of three different chemical elements. Decide whether the element is a metal nonmetal, if you can. If there is not enough information to decide, choose can't decide in the third column. element description metal or nonmetal? Element 1 is a moderately soft silvery-gray solid. A 5 cm x 5 cm square of it, only 1 mm thick, is heated with a flame at one end. The square becomes warm and starts to soften all over. O metal O nonmetal O (can't decide) 1 Element 2 is a hard silvery-grăy solid. Wires are fastened to each side of a 2 cm slab of it, and an ordinary household 9 V battery is hooked up so that it can feed electricity through the slab to an LED. The LED glows brightly. O metal O nonmetal O (can't decide) 2 Element 3 is a moderately soft silvery-gray solid. A 5 cm x 5 cm square of it, only 1 mm thick, is pressed into a dish-shaped mold under high pressure. When the press is lifted up, the sample has been crushed to a powder. O metal O nonmetal O (can't decide) 3
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
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