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Every element in the first period has only one orbit. This means that they can have only a duplet in their valence shell, which happens to be their only electronic shell. The elements included in the first period are Hydrogen and Helium.

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15y ago
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15y ago

Just one the 1S orbital.

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11y ago

2 for its orbitial :)

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12y ago

Two electrons in the outer shell.

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Q: How many shells do the 4th period elements have?
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Related questions

What do elements in the 4th period have in common?

whatdo element in 4th period have in common


How many elements can the 3rd shell hold?

The 3rd shell can contain 18 electrons. The elements that have a 3rd shell as the outer shell are the the elements in period 3, where the 3s and 3p orbitals are filled to a maximum of 8 electrons. The 3d orbitals are filled in the 4th period in the transition elements.


Is a chlorine atom larger than a bromine?

Chlorine is in 3rd period and 17th group bromine is in 4th period and 17th group. The number of shells present in an atom is equal to the period no. In which it is present. So, chlorine has 3 shells while bromine has 4 shells. And atomis size is the distance between centre of nucleus and outermost shell. So, bromine atom is larger than bromine atom..


What has the chemical symbol As?

Arsenic, which is in the 15th group 4th period of the periodic table of elements and has an atomic number of 33.


How many electron energy levels are in an atom of Calcium?

4 since it is in period 4 of the Periodic Table of Elements


Why does period 3 has a maximum of 8 elements and not 18?

According to a law, the orbital with lower n+l value fills first. So 4S has lower energy i.e. lower n+l value (4) than 3D (5). So the elements after 3P^6 move to the 4th periodic table .


What period is potassium k located?

Potassium (K) is a metal in Group I of the Periodic Table of the Elements. K has an atomic number of 19 and a molecular weight of 39.10 grams per mole.


Does group 4 on the periodic table elements have four valence electrons?

All elements in the 4th period (elements with atomic number 19 to 36) have four energy levels.


What is the period of bromine?

4th period


How many electron shells does germanium have?

Germanium, which has 32 electrons and protons, has 4 energy levels or electron shells. There are 2 electrons in the 1st shell, 8 in the 2nd shell, 18 in the 3rd shell and 4 in the 4th shell.


What period is calcium in?

Calcium is present in period 4. its group no. is 2


What is the period for the element calcium?

its the 4th period