CОЧ 2 ЧЕТВЕРТЬ | Baamboozle - Baamboozle

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what is the atomic mass of phosphorus ?

31

Number of neutrons of Iron?

5 types of indicator which we used for laboratory works.

Universal indicator paper, litmus paper, methyl orange, phenolphthalein, red cabbage juice

Number of electrons of Be?

Draw the structure of the atom and label it.

milk is base or acid?

acid

What is the acid? give an example

tell 5 properties for nonmetals

tell 3 properties for metals

1. They are good conductors of electricity. 2. They are solid in room conditions. 3. They have a metallic, shiny color.

what is the symbol for silicon?

Si

what is the atomic mass?

What is the indicator?

What are the natural sources that cause air pollution?

Number of protons of Co?

what is the atomic number?

What is the base? give an example

water is ..

neutral

what is the atomic number of Cr?

24

Human activities that are responsible for world’s air pollution

What is the diatomic molecule?

molecule that contains two atoms