Among all the elements in period 2 of the modern periodic table,
lithium (Li)
is known to have the lowest mass. The noble gas neon (Ne) has the highest mass among all the elements in period 2.
Which elements in period 2 has 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 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.
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 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.
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.
What are the first 30 elements?
| ATOMIC NUMBER ELEMENT ATOMIC MASS | 1 Hydrogen 1.008 | 2 Helium 4.0026 | 3 Lithium 6.94 | 4 Beryllium 9.0122 |
|---|
What is the name of 21 element?
| Atomic Number Symbol Name | 21 Sc Scandium | 22 Ti Titanium | 23 V Vanadium | 24 Cr Chromium |
|---|
Which is the smallest element?
| 3A | (13) | 4A | (14) | 5A | (15) | 6A | (16) |
|---|
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.
What do you call the element from atomic number 57 71?
The elements from atomic number 57 to 71 are called
Lanthanides
. They are called lanthanides, since lanthanum is chemically identical to the elements in the sequence. … The lanthanides are between Barium and Hafnium.
What is the element in Group 13 and period 2?
The boron family contains elements in group 13 of the periodic talbe and include the semi-metal boron (B) and the metals aluminum (Al),
gallium (Ga)
, indium (In), and thallium (Tl).
What are the F block elements?
The f block elements are
the lanthanides and actinides
and are called the inner transition elements because of their placement in the periodic table due to their electron configurations. The f orbitals of the electron shell are filled with “n-2.” There is a maximum of fourteen electrons that can occupy the f orbitals.
What are the seven elements of nature?
The seven element theory included all elements on earth:
plants, warm energy, soil, mineral, water, cold energy, and air
. This theory introduced each element’s material, property, characteristics, function, relationship to each other, and relationship with life and organs.
What element is found in Group 2 and period 4?
The given element is
calcium
.
