Question

Эти 8 химических элементов составляют 99% земной коры по массе. Укажите их.

Answer 1

 кислород, кремний, алюминий, железо, кальций, натрий, калий и магний

Answer 2

The 8 chemical elements that make up 99% of the Earth's crust by mass are:

1. Oxygen (O) - Oxygen is the most abundant element in the Earth's crust, making up approximately 46.6% of its mass. 2. Silicon (Si) - Silicon is the second most abundant element in the Earth's crust, comprising about 27.7% of its mass. 3. Aluminum (Al) - Aluminum is the third most abundant element in the Earth's crust, accounting for approximately 8.1% of its mass. 4. Iron (Fe) - Iron is the fourth most abundant element in the Earth's crust, making up about 5% of its mass. 5. Calcium (Ca) - Calcium is the fifth most abundant element in the Earth's crust, comprising around 3.6% of its mass. 6. Sodium (Na) - Sodium is the sixth most abundant element in the Earth's crust, accounting for approximately 2.8% of its mass. 7. Potassium (K) - Potassium is the seventh most abundant element in the Earth's crust, making up about 2.6% of its mass. 8. Magnesium (Mg) - Magnesium is the eighth most abundant element in the Earth's crust, comprising around 2.1% of its mass.

These eight elements together make up approximately 99% of the Earth's crust by mass.

It's important to note that the exact percentages may vary slightly depending on the source, but these elements are generally recognized as the most abundant in the Earth's crust.