What is the mass number for an oxygen atom with 10 neutrons?
18
What element has 22 neutrons?
Argon
What has 53 protons and 74 neutrons?
The most common, stable form of iodine has an atomic number of 53 (protons) and an atomic weight of 127 (53 protons plus 74 neutrons). Because its nucleus has the “correct” number of neutrons, it is stable and is not radioactive.
What is the symbol of the element that has 22 neutrons and 18 protons?
Ar
What is the mass number of an element having atomic number 18 and having 22 neutrons?
So, the atomic number is also 18, and the element with atomic number 18 is Argon with the symbol Ar. Now we need to find the mass number of Argon. Since, a neutral atom of argon also has 22 Neutrons. So, it is clear that this is not an isotope but a neutral atom of Argon.
Why is argon purple?
The argon atom has 18 electrons and 18 protons. Its outer shell is full with eight electrons. Under standard conditions argon is an odorless and colorless gas. When argon is excited by a high voltage electric field it glows in a violet color.
What is the biggest size in the second period?
Lithium
Is phosphorus atomic radius smaller than magnesium?
(b)- Phosphorus has a larger atomic radius due to a larger effective nuclear charge. (c)- Magnesium has a larger atomic radius due to more electron levels.
Which element has a smaller atomic radius than phosphorus?
Neon
Which atom has smallest size?
atoms
| Element | Symbol | Atomic radius in nanometers |
|---|---|---|
| hydrogen | H | 0.037 |
| helium | He | 0.05 |
| lithium | Li | 0.152 |
| beryllium | Be | 0.111 |
Which atom is the smallest?
hydrogen atom
What element in the third period has the largest atomic radius?
Sodium