Please help 1: what is a limitation of using marbles as models for atoms?

2: density is the mass of matter in a given volume. materials that are less dense flood on denser materials. explain why ice floats on water.

3: how dose the overall charge of oxygen-16 compare to oxygen-17 and oxygen-18?

4: how dose an elements atomic mass differ from its mass number?

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.

you need to stop taking that class

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