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Chemistry
GCSE

Describe and explain how the reactivity of the elements changes as you go down group 1

As you go down group 1, the reactivity increases. This is because each element has only one electron in their outer shell, so need to lose this electron in order to react. As you go down group 1, the numb...

ES
Answered by Edward S. Chemistry tutor
3885 Views

Explain the molecular structure of CH4 (methane)

Methane is a gas made up of 1 carbon atom for every 4 hydrogen atoms. The central carbon atom forms covalent bonds with these 4 hydrogen atoms (they share an electron each), and this sharing completes the...

AP
Answered by Asha P. Chemistry tutor
46714 Views

What is ionic bonding? Give an example

A bond formed between a metal atom and a non-metal atom in which electrons are transferred from the metal atom to the non-metal atom, forming ions. If an atom loses an electron, it becomes positively char...

SA
Answered by Safia A. Chemistry tutor
2317 Views

What is the overall charge of the nucleus of an atom, and why?

Positive. The neutrons found in the nucleus have a neutral charge, however the protons are positively charged. Therefore the overall charge is positive.

SA
Answered by Safia A. Chemistry tutor
40753 Views

Balance the equation and write the products of the following reaction for complete combustion: CH4 + O2 ---> _ + _

Student should know complete combustion produces COand H2O Once products are known, equation can be balanced as:  CH4 + 2O2 ---> CO2 + 2H2<...

AR
Answered by Adam R. Chemistry tutor
2483 Views

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