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The number of protons in the nucleus will ALWAYS be the same for a specific element.

(ex: Hydrogen always has EXACTLY 1 proton)

But, the number of electons and neutrons can vary in a particular element.

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16y ago
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10y ago

Atoms are composed of the subatomic particles electrons, protons, and neutrons. Elements are composed of one kind of atom. The identity of an element is determined by the number of protons in the nuclei of its atoms, which is called its atomic number. All atoms of the same element have the same number of protons.

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15y ago

The number of protons in an atoms nucleus defines the element.

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9y ago

This particle is called proton.

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15y ago

protons

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Q: What Atomic particle controls its reactivity?
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Related questions

Tiny particle in an atom that has a negative charge?

The main negatively charged particle in an atom is the electron. The electron controls the reactivity of an element. An even smaller particle is a quark, which composes protons and neutrons. Quarks can be either positively or negatively charged.


What subatomic particles controls the identity?

Protons determine the identity of an element because each element has a unique number of protons in its nucleus, known as its atomic number. The atomic number determines the element's chemical properties and its place on the periodic table. Electrons also play a role in identity by determining the element's reactivity and bonding behavior.


What is the atomic mass-?

The atomic mass is the mass of a molecule, atomic particle or sub-atomic particle.


What is the reactivity for the halogens?

The reactivity of halogens decreases with increasing atomic number.


Which atomic particle has an atomic mass of one amu but no net charge?

This atomic particle is the neutron.


What happens to the chemical reactivity of alkali metals as you increase atomic numbers?

The chemical reactivity of alkali metals increase when the atomic number increase.


An atomic particle that is positively charged?

This particle is the proton.


What atomic particle is found in the orbitals or energy levels outside the nucle us?

Electrons are the atomic particles found in the orbitals or energy levels outside the nucleus of an atom. Electrons have a negative charge and are involved in chemical bonding and determining an element's reactivity.


What atomic particle that is negatively charged?

Electron is an atomic particle that carries a negative charge.


A neutral atomic particle called a proton?

A neutral atomic particle is called a proton. This is taught in science.


The neutral particle of an atom weighing approximately one atomic mass unit?

This atomic particle is the neutron.


The Subatomic Particle That Has No Charge?

In the atomic nucleus this particle is the neutron.