An element is a substance made of many atoms of the same kind. Silver and gold are different elements, for the following reason:
- silver is an element whose atoms have atomic number 47 (i.e., an atom of silver contains 47 protons and 47 electrons)
<span>- gold is an element whose aroms have atomic number 79 (i.e., an atom of gold contains 79 protons and 79 electrons)</span>
Answer:
10000
Explanation:
When the decimal point shifts towards left, for each shift, the number is actually divided by 10.
When the decimal point shifts towards right, for each shift, the number is actually multiplied by 10.
when decimal point is shifted by total four units towards left, it is 0.0003 It is same as that dividing 3.0 by 10000
The mass number is calculated by adding the number of protons and the number of neutrons.
Therefore, you can find the number of neutrons by subtracting the number of protons from the mass number. The number of protons is equal to the atomic number, therefore you just have to do the mass number - atomic number to find the number of neutrons.
82 - 26 = 56 neutrons.
Answer:
float
Explanation:
The mass of the cube with volume 125 ml = 125 cm³= 20g.
The Mass of 125 ml of water is about 125g.
The same volume of water is heavier than the cube.
Answer:
Atoms are composed of electrons (charge -1), protons (charge +1), and neutrons (no charge). So in a neutral atom the correct answer is "D".