Q:

What are the two regions of an atom called?

A:

Quick Answer

An atom is the basic unit of a chemical element, and the two main regions of this structure are the nucleus and electrons. The nucleus is positively charged, while the electrons are negatively charged and orbit the nucleus.

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Full Answer

Almost all of the atom is made up of the nucleus, which is comprised of uncharged neutrons and protons, which are the nucleus's positively charged components. Electrons constantly orbit the nucleus, and when the number of electrons equals the element's atomic number, the atom is considered to be neutral. The atom's chemical and electrical properties are ultimately decided by the outermost electrons.

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Related Questions

  • Q:

    What is an atomic radius?

    A:

    The atomic radius describes the size of the atom, and although there is no standard definition for the value, it is the distance between the nucleus and the outermost electrons. Atomic radii tend to increase moving down the periodic table, but they decrease moving left to right across the table because electrons are more tightly packed for elements that are closer to the right side.

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  • Q:

    Why do atoms get smaller across a period?

    A:

    Moving across periods on the periodic table from left to right, the atoms tend decrease in radius size because each atom has more protons than the atom before it, meaning there is more of an attractive force in the nucleus that pulls the electrons closer to the center. Even though there are both more protons and electrons, the attractive force of the protons wins out and makes the radius of the entire atom smaller.

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    How many valence electrons are in an atom of magnesium?

    A:

    Each magnesium atom has two valence electrons. Valence electrons obtain their name from their location within an atom. These electrons are located within the outer layer of an atom.

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  • Q:

    How many electrons are in the fifth energy level?

    A:

    There is a potential maximum of 50 electrons in the fifth energy level of an atom. The formula for determining the maximum number of electrons in any energy level is two times n squared, where n is the energy level.

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