2.An ion that has similar electron configuration to that of Neon (Ne10 ) is a. Cl-1 b. Na +1 c. Na d. O-1 3.The pair of ions listed below with similar chemical properties is a. F- & Cl- b. F- & Li + c. Na+ & Cl- d. Na + & F- 4.According to the octet rule a Calcium atom has a tendency to a. lose one electron b. lose two electrons c. gain one electron d. gain two electrons

its weight is greatest on earth

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.