Answer:
About 60.
Explanation:
Mendeleev knew of 63 elements. He wrote their properties on cards and arranged them in order of atomic mass.
That's how he discovered that the properties of elements are periodic functions of their atomic masses.
B is the answer
I double checked hope it helps
Answer:

Explanation:
Force is equal to mass times acceleration.

By dividing both sides by m, we rearrange the formula for a (acceleration).

The force is 6.2 Newtons, but we can convert the units to make the problem easier later on.
- A Newton is equal to 1 kg*m/s², so 6.2 N is equal to 6.2 kg*m/s².
The mass is 2300 grams, but we need to convert it to kilograms.
- To convert grams to kilograms, divide by 1,000
- 2300 g/1000= 2.3 kg

Substitute the values into the formula.

Divide. Note that the kilograms or "kg" will cancel each other out (this is why we converted the units).


Round to the nearest tenth. The 9 in the hundredth place tells us to round up to 2.7

The acceleration is about <u>2.7 meters per second squared.</u>
Answer:
21.9g
Explanation:
This is the answer if you are on edginuity,