Answer:
The atomic number represents the number of protons
Explanation:
Answer:
Use energy more efficiently. Producing electricity and natural gas and delivering it to your door generates greenhouse gas emissions. ...
Install renewables. ...
Conserve water. ...
Reduce, reuse, recycle. ...
Travel less. ...
Consider near sourcing. ...
Ship goods more efficiently.
Completely turn off equipment like televisions and stereos when you're not using them.
Choose energy-efficient appliances and light bulbs.
Save water: some simple steps can go a long way in saving water like, like turning off the tap when you are brushing your teeth or shaving.
Answer:
The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains. In other words, the number of neutrons in an atom is its mass number minus its atomic number.
Explanation:
protons
The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different mass numbers , but they can be the same. For example, the mass number of argon atoms and calcium atoms can both be 40.
As we move down the group, the metallic bond becomes more stable and the formation of forming covalent bond decreases down the group due to the large size of elements.
Covalent and metallic bonding leads to higher melting points. Due to a decrease in attractive forces from carbon to lead there is a drop in melting point.
Carbon forms large covalent molecules than silicon and hence has a higher melting point than silicon.
Similarly, Ge also forms a large number of covalent bonds and has a smaller size as compared to that of Sn. Hence melting point decreases from Ge to Sn.
The order will be C>Si>Ge>Pb>Sn.
To learn more about the covalent bond, visit: brainly.com/question/10777799
#SPJ4
