Two or more for POLY atomics, or in the other case it were a 'mono' atomic ion (= ONE)
yes it is. It is made up of 2 elements that have a charge so it is polyatomic Sources: My textbook
The polyatomic ion oxide is O2-, which consists of two oxygen atoms with a charge of -1. This ion is commonly found in compounds such as magnesium oxide (MgO) and carbon dioxide (CO2). Oxoanions containing oxygen and other elements can also form polyatomic ions with the oxide ion.
To answer this, we simply need to consider the lightest of the chemical elements, hydrogen. Hydrogen's atomic number, and thus its number of protons and electrons, is 1. So, by necessity, that is the minimum amount of valence electrons an atom can have.
HCO3- is the polyatomic ion with which sodium bonds. It is the bicarbonate ion.
Polyatomic ions can be obtained by combining multiple atoms of different elements that are covalently bonded together. These ions have an overall charge and behave as a single unit in chemical reactions. They are commonly found in compounds such as salts and acids.
These elements are found after uranium.
112
All the elements with the atomic number in the range 1-97.
Hydroxide is not an element; it is a polyatomic anion made of one oxygen and one hydrogen atom bonded together with a charge of -1. It is commonly found in chemical compounds, such as in bases like sodium hydroxide (NaOH).
All organic compounds contain carbon and hydrogen as a minimum. Other elements are found in some organic compounds such as oxygen, nitrogen or sulphur.
All elements in the groups (excluding transition metals) have the same number of electrons as the group number.
The periodic table has about 118 elements, if that's what you're asking.