What is the atomic number of element 42?

molybdenum
Chemistry in its element: molybdenum And 42, as every Mendeleev fan knows, is the atomic number of molybdenum.

What is the name of atomic number 42?

The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).

What element has an atomic number of 20 and a mass number of 42?

Calcium is an element that has an average atomic mass of 40.08 grams/mol. While the atomic number of the Calcium atom is equal to 20. It means that the Calcium atom contains 20 protons in the atomic structure.

What are the 1st 20 elements of periodic table?

Lithium, Beryllium, Sodium, Magnesium, Aluminium, Potassium, and Calcium are metals in the first twenty elements. Hydrogen, Helium, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Phosphorous, Sulphur, Chlorine, and Argon are the non-metals in the first twenty elements.

What is the correct symbol for the atom with 42 protons and 49 neutrons?

Molybdenum is a chemical element with symbol Mo and atomic number 42.

Which of the following is the atomic mass of an atom containing 42 protons 42 electrons and 37 neutrons?

The electron’s size is miniscule in comparison to both the proton and the neutron and as a result does not contribute to the mass of the atom. So, adding 42 protons with 37 neutrons results in an atomic mass of 79.

What is the element with an atomic number of 20 and a mass number of 40?

Calcium (Ca)
Calcium (Ca) has atomic number 20 and mass number 40 .

What are the twenty 20 element?

What are the First 20 Elements of the Periodic Table?

Atomic Number	Element	Symbol
17	Chlorine	Cl
18	Argon	Ar
19	Potassium	K
20	Calcium	Ca

Which symbol shows an atom of element having 42 protons 42 electrons and 65 neutrons?

What is the correct symbol for the atom with 42 protons and 49 neutrons quizlet?

1 Answer. If Z = 42 , the beast is molybdenum.