Why cl is 35.5

Explain this statement. This statement means one atom of chlorine is Home Question Answer a The relative atomic mass of Cl atom is Explain this statement a The relative atomic mass of Cl atom is Best Answer a. The value of avogadro's number is 6.

The molar volume of a gas at STP is Related questions Compare and contrast the arrangement of elements in Mendeleev periodic table and the Modem periodic table. In the modem periodic table, calcium atomic number 20 is surrounded by elements with atomic.

How does the electronic configuration of an element relate to its position in the modem periodic table. Nitrogen atomic number 7 and phosphorus atomic number 15 belong to group 15 of the periodic table. The positions of three elements A, B and C in the periodic table are shown below:. An atom has electronic configuration 2, 8, 7. What property do all elements in the same column of the periodic table as fluorine have in common. They have the symbol A r. Take care not to confuse mass numbers and relative atomic masses:.

For example, the relative atomic mass of chlorine is This is because chlorine contains two different isotopes, chlorine and chlorine The table shows the mass numbers and abundances of the isotopes of copper in a naturally-occurring sample. What is the relative atomic mass of copper? In a sample of copper atoms, there would be 70 copper atoms and 30 copper atoms. So the relative atomic mass of copper could be shown as Isotopes Atoms of an element that have the same number of protons , but different numbers of neutrons in their nuclei are called isotopes.

Isotopes of an element can be easily spotted because: their atomic number is the same but their mass numbers are different Three isotopes of hydrogen All hydrogen atoms contain one proton and one electron because atoms must be electrically neutral , but they can contain different numbers of neutrons.