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Which element has a mass number of 40 and only has 2 valance electrons?
The element that has a mass number of and two valence electrons is an isotope of calcium.
What is the mass number of 40Ca?
40: 40Ca is an alternative method of writing calcium-40.
The Atomic and mass number for calcium?
Calcium is a metal element. Atomic mass of it is 40.
Does Ca and Ar have same mass numbers 40?
No, calcium (Ca) has a mass number of 40, while argon (Ar) has a mass number of 40 as well.
What is the mass number atomic mass of the most common isotope of argon?
Argon is a non metal element. Mass number of it is 40.
What is the mass number of the atom of argon?
The mass number of an atom of argon is 40. This number represents the total number of protons and neutrons in the nucleus of the argon atom.
What is the mass number of argon?
It is 40!
Why is 40 the mass number of phosphorus?
Phosphorus is a non metal element. Mass number of it is 31.
Explain how you would calculate the number of neutrons in potassium -40?
To calculate the number of neutrons in an atom of potassium-40, subtract the atomic number (which is 19 for potassium) from the mass number (which is 40 for potassium-40). So, 40 (mass number) - 19 (atomic number) = 21 neutrons in potassium-40.
What is the rounded mass number of Argon?
Argon is a non metal element. Mass number of it is 40.
Most calcium atoms have an atomic number of 20 and a mass number of 40 but some calcium atoms have a mass number of 48 What word could you use to describe these two kinds of calcium atoms?
Isotopes. Calcium atoms with a mass number of 40 represent the most common isotope, while those with a mass number of 48 are a less common, but still natural, isotopic form of calcium.
What is the mass number of Ca?
97% of the naturally occurring Calcium is isotope Ca-40, so massnumber 40. Other isotopes have massnumber 42 to 48
