Question

Plsssss can you answer these questions.

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Answer 1

Answer:

1-Elements are typically classified as either a metal or nonmetal, but the dividing line between the two is fuzzy. Metal elements are usually good conductors of electricity and heat. The subgroups within the metals are based on the similar characteristics and chemical properties of these collections.

2-Water is a compound but still it is a pure substance . A sugar solution is a compound but still it is not a pure substance. ... Sugar solution can also be seperated by a method.

3-alum.

4-The metal which exist as a liquid at room temperature is mercury.

5-This is because they have no free electrons. C(in the form of graphite)is the only non-metal which is a good conductor of heat and electricity and therefore it is used in making electrodes. 3)They are not lustrous:They are dull. Iodine is the only non-metal which is lustrous.

6- graphite

7-The elemental semiconductors are those composed of single species of atoms, such as silicon (Si), germanium (Ge), and tin (Sn) in column IV and selenium (Se) and tellurium (Te) in column VI of the periodic table. There are, however, numerous compound semiconductors, which are composed of two or more elements.

8-answer is one solid non metal is fluroine , one liquid non metal is bromine , non metal gaseous is neon or oxygen ..

9-All elements are mostly pure substances. A few of them include gold, copper, oxygen, chlorine, diamond, etc. Compounds such as water, salt or crystals, baking soda amongst others are also grouped as pure substances.

Explanation:

hope it is useful.....

Answer 2

Answer:

1. elements are classified into two metal and non metal

2. no sugar is not pure substance

3. Alum

4. Mercury is the only metal which exists in liquid state

5. Diamond

6. Graphite

7. Semiconductors are materials which have a conductivity between conductors (generally metals) and nonconductors or insulators (such as most ceramics). Semiconductors can be pure elements, such as silicon or germanium, or compounds such as gallium arsenide or cadmium selenide.

8