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It has two electronic shell and its highest quantum no is 2

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Do you know the smallest atom in 2 period?

Neon


What does the period number tell about the energy leaves occupied by electrons in an atom?

The period number of an element in the periodic table indicates the highest principal energy level that electrons occupy in an atom. For example, elements in Period 1 have electrons in the first energy level, while those in Period 2 have electrons in the first and second energy levels. Thus, the period number directly reflects the number of electron shells or energy levels present in the atom. Each subsequent period adds an additional energy level.


What is a description of radiation?

alpha radiation consists of 2 protons and 2 neutrons. It comes from the nucleus of an atom.


What element is found on period 4 and has 7 valence electrons?

Only nitrogen (but in the period 2) has 7 electrons in the neutral atom.


A covalent compound formed between an element in period 2 and a halogen?

An example of a covalent compound formed between an element in period 2 and a halogen is hydrogen fluoride (HF). This compound is formed by the sharing of electrons between the hydrogen atom (period 1) and the fluorine atom (halogen).


What is the periodic table of the elemets?

Atom number 20 is Calcium (period IV, group 2)


What does the name helium-3 tell about this atom?

The name helium tells that its atomic number is 2, containing 2 protons in each atom. The numerical part of the name shows that each atom also has one neutron.


What does it mean when your period comes late 2 months straight?

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How many rings does a lithium atom have?

Lithium is in the second period. It is an alkali metal. It has 2 rings of electrons.


What is the 20th elemet of the periodic table?

Atom number 20 is Calcium (period IV, group 2)


How do the periods on the periodic table get their numbers?

if an element has 1 shell in its atom it is in period 1and so on... 2 shells=period 2 3 shells=period 3 4 shells=period 4 5 shells=period 5 6 shells=period 6 7 shells=period 7


How do you tell if there is an atom in everything?

This supposition is the basis of the atomic theory, beginning 2 500 years ago.