Question

there are answer naturally - occurring elements. seventy - five percent of the universe is answer. the earths crust and the human body are made of different elements. but answer is an element that is abundant in both. most objects are made of answer with approximately ten million known and over answer being developed every answer.

Explanation:

Step1: Number of naturally - occurring elements

There are 92 naturally - occurring elements. So the first blank is filled with 92.

Step2: Abundant element in the universe

Seventy - five percent of the universe is hydrogen. So the second blank is filled with hydrogen.

Step3: Element abundant in Earth's crust and human body

Oxygen is an element that is abundant in both the Earth's crust and the human body. So the third blank is filled with oxygen.

Step4: Composition of most objects

Most objects are made of compounds. So the fourth blank is filled with compounds.

Step5: Number of known compounds

There are approximately ten million known compounds.

Step6: New compounds developed

Over 20 million compounds are being developed every year. So the fifth blank is 20 million and the sixth blank is year.

Answer:

92, hydrogen, oxygen, compounds, 20 million, year