Which Element In Period 2 Has Less Mass?

Among all the elements in period 2 of the modern periodic table,

lithium (Li)

is known to have the lowest mass.

Which element in Period 2 have the most mass?

The element in Period 2 with most mass is clearly the element with the highest atomic number, Z , and that is

Ne

, Z=10 , 21.08⋅g⋅mol−1 .

Which element has smallest mass?

The element which has the smallest atomic mass is

Hydrogen (H)

, which has a proton and an electron. The atomic radius decreases as we move from left to right along the period. And The atomic radius increases down the group. Thus, helium is the smallest element, and francium is the largest.

Which element in Period 2 is the lightest?

With a density of 0.564 g⋅cm

^{− 3}

,

lithium

is the lightest metal and the least dense solid element.

Which elements mass is 2?

Consider the

element helium

. Its atomic number is 2, so it has two protons in its nucleus. Its nucleus also contains two neutrons. Since 2 + 2 = 4, we know that the mass number of the helium atom is 4.

What number increases from 3/10 to Period 2?

In the periodic table,

atomic number

increases from 3 to 10 in period 2. Explanation: Atomic numnber is the total number of protons present in an atom.

Which period has the most elements?

The seventh period contains 32 elements, tied for the most with

period 6

, beginning with francium and ending with oganesson, the heaviest element currently discovered.

Which is the smallest element?

Which atom has smallest size?

Helium

is the atom having the smallest size.

The atomic radius gets smaller because the electron orbit fills up to form an octet and for each of the additional electron, a proton is added to the nucleus, pulling all the electron shells closer around the nucleus.

How do we calculate atomic mass?

For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number. This is because each proton and each neutron weigh one atomic mass unit (amu).

By adding together the number of protons and neutrons and multiplying by 1 amu

, you can calculate the mass of the atom.

What is the first lightest element?

Hydrogen

is the lightest element and exhibits the simplest atomic structure.

What is the 3rd lightest element?

Lithium

is the lighest solid and metal and the third lightest element.

What is the light element?

Alternatively, a ‘light element' may refer to

any chemical element produced during the first few minutes after the Big Bang

, including, in addition to hydrogen and helium, lithium, beryllium, and boron. …

What are the first 30 elements?

What is the name of 21 element?

Is atomic mass a unit?

The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit (

amu

, also known as daltons, D). The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope.