Element R Elemento
12P
Which statement best describes the positions of the two elements in the periodic table?
O A. The two elements are in the same period, with Element R the first element in the period and Element Q the last element.
OB. The two elements are side by side in the same period, with Element Q to the left of Element R.
OC. The two elements are in the same group, with Element R just above Element Q.
D. The two elements are in the same group, with Element Q at the top of the group and Element R at the bottom.

a

Explanation:

state the principle of separating two immiscible liquids by separating funnel. describe an activity with diagram to separate a mixture of water and kerosene oil. answer: immiscible layers separate out in layers depending on their densities in separating funne

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.