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What is the indicator?
5 types of indicator which we used for laboratory works.
Universal indicator paper, litmus paper, methyl orange, phenolphthalein, red cabbage juice
What is the acid? give an example
What is the base? give an example
milk is base or acid?
acid
water is ..
neutral
what is the atomic mass?
what is the atomic number?
what is the symbol for silicon?
Si
what is the atomic number of Cr?
24
what is the atomic mass of phosphorus ?
31
Number of protons of Co?
Number of electrons of Be?
Number of neutrons of Iron?
What is the diatomic molecule?
molecule that contains two atoms
Draw the structure of the atom and label it.
