Hydrogen and helium are the most abundant elements in stars.
Assuming the question is for computers, on Excel go to Edit then click on Replace. A box appears with Find what: Replace with: so fill in those two boxes then click on Replace.
The two most abundant resources of Eastern Central Europe are coal and forests.
An apostrophe.
redundant, abundant
The two most abundant gases in the Earth's atmosphere are nitrogen (about 78%) and oxygen (about 21%).
hydrogen and oxygen
The two most abundant gases in Earth's atmosphere are nitrogen (about 78%) and oxygen (about 21%).
Hydrogen and helium are two elements that are abundant in nebulae. These elements are formed during the processes of stellar nucleosynthesis and are common building blocks of the universe.
The two most abundant gases in Earth's atmosphere are nitrogen (approximately 78%) and oxygen (approximately 21%).
Oxygen and silicon are the two most abundant elements in the Earth's crust. They make up about 75% of the Earth's crust by weight.
Abundant, large and substantial are words. Those are the opposite of considerable.