The outer and inner core of the earth make up approximately one third of earth’s mass.

true

false

False

Explanation:

Earth is divided into three parts, namely-

a) Crust

b) Mantle

c) Core

The core, including the inner and the outer core, starts from the depth of about 2900 km up to 6400km. It is a depth greater than the depth from the surface of the earth to the lower limit of the mantle. It is comprised of the denser materials here, where the outer core is liquid and the inner core is solid. The density is maximum here. Since density and mass are directly proportional, so it can be considered that the mass also is significantly high in this region. It covers more than about 50% of the earth's total mass.

Thus it does not form one-third of the earth's mass.

hence, the above-given statement is false.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

lol for the pointsss