Answer:
The number of protons you welcome
Explanation:
They are about 4.5 billion years old. Hope this helps.
Thermal energy transfers in a solid state, due to convection, in metalic substances.
This is because the covalent bonds between the atoms are being broken and reformed again while the metal is experiencing stress. <em>covalent bonds store energy. </em>
<u>Answer:</u> The correct answer is Potassium-39, Potassium-40, Potassium-41
<u>Explanation:</u>
Atomic number is defined as the number of protons present in an atom.
Mass number is defined as the sum of number of protons and number of neutrons present in an atom. It is represented as A.
A = Mass number = Number of neutrons + Number of protons.
For the given isotopes of potassium:
Atomic number of potassium is 19.
<u>For potassium-41 isotope:</u>
Mass number = 41
Number of neutrons = 41 - 19 = 22
<u>For potassium-39 isotope:</u>
Mass number = 39
Number of neutrons = 39 - 19 = 20
<u>For potassium-40 isotope:</u>
Mass number = 40
Number of neutrons = 40 - 19 = 21
The most number of neutrons are in potassium-41 isotope and the least number of neutrons are in potassium-39
Hence, the correct answer is Potassium-39, Potassium-40, Potassium-41
The partial pressure<span> of </span>water<span> in the mixture, P</span>water<span>, is the equilibrium </span>vapour pressure<span> of </span>water<span> at the temperature specified. At 298 K, from the data at the beginning of the questions section, P</span>water<span> = 3.17 kPa. Using the Ideal Gas Equation, the number of moles of N</span>2<span> can be calculated.</span>
