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The answers have to be include monatomic and plyatomic ions present and ratio between positive and negative ions is one to two, and a group IIA element that loses one half of its total electrons upon ion formation is present, and the sum of the atomic numbers for the two elements involved in the polyatomic ion is 13.
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Is Na2Cr2O7 binary ionic or ionic with a polyatomic ion?
Na2Cr2O7 is an ionic compound with a polyatomic ion. The polyatomic ion present in this compound is the chromate ion (Cr2O7)^2-.
What does the subscript in a formula tell you?
The subscript in a formula typically indicates the number of atoms of an element present in a molecule. It is used to specify the ratio of atoms in a compound or the number of atoms in a polyatomic ion.
When to use parenthesis when writing ionic compound formulas?
Parentheses are used in ionic compound formulas when multiple polyatomic ions are present. The parentheses are used to indicate a subscript that applies to all the elements inside the parentheses. For example, in the formula for calcium nitrate (Ca(NO3)2), the parentheses indicate that the nitrate ion (NO3) has a subscript of 2.
When a polyatomic ion is in parentheses and there is a subscript on the outside of it is the polyatomic ion multiplied or add?
The subscript outside the parentheses applies to all the elements within the polyatomic ion. It indicates how many of the entire polyatomic ion are present in the compound.
When writing an ionic formula how do you indicate that a polyatomic group is present more than one time?
To indicate that a polyatomic group is present more than once in an ionic formula, you enclose the group in parentheses with a subscript outside the parentheses representing the number of times it occurs. For example, in calcium nitrate (Ca(NO3)2), the polyatomic nitrate group (NO3) is present two times.
Is Na2Cr2O7 binary ionic or ionic with a polyatomic ion?
Na2Cr2O7 is an ionic compound with a polyatomic ion. The polyatomic ion present in this compound is the chromate ion (Cr2O7)^2-.
Which polyatomic ion forms a neutrak compound when combined with a group 1A monatomic ion in a 1 1 ratio?
Since Group 1A monatomic ions have a charge of 1+, only a polyatomic ion with a charge of 1- can combine to form a compound in which the monatomic ions and polyatomic ions are present in a 1 to 1 ratio. The following polyatomic ions with a charge of 1- can form a neutral compound when combined with a group of 1A monatomic ion in a 1 to 1 ratio.acetate - C2H3O2-bicarbonate (or hydrogen carbonate) - HCO3-bisulfate (or hydrogen sulfate) - HSO4-chlorate - ClO3-chlorite - ClO2-cyanate - OCN-cyanide - CN-dihydrogen phosphate - H2PO4-hydroxide - OH-nitrate - NO3-nitrite - NO2-perchlorate - ClO4-permanganate - MnO4-thiocyanate - SCN- Source: http://chemistry.about.com/od/chartstables/tp/common-polyatomic-ions.htm
Does MgSO4 contain polyatomic ions?
Yes. Mg2+ is a monatomic ion, but SO42- is a polyatomic ion composed of two elements, sulfur and oxygen.
What does the subscript in a formula tell you?
The subscript in a formula typically indicates the number of atoms of an element present in a molecule. It is used to specify the ratio of atoms in a compound or the number of atoms in a polyatomic ion.
When to use parenthesis when writing ionic compound formulas?
Parentheses are used in ionic compound formulas when multiple polyatomic ions are present. The parentheses are used to indicate a subscript that applies to all the elements inside the parentheses. For example, in the formula for calcium nitrate (Ca(NO3)2), the parentheses indicate that the nitrate ion (NO3) has a subscript of 2.
When a polyatomic ion is in parentheses and there is a subscript on the outside of it is the polyatomic ion multiplied or add?
The subscript outside the parentheses applies to all the elements within the polyatomic ion. It indicates how many of the entire polyatomic ion are present in the compound.
When writing an ionic formula how do you indicate that a polyatomic group is present more than one time?
To indicate that a polyatomic group is present more than once in an ionic formula, you enclose the group in parentheses with a subscript outside the parentheses representing the number of times it occurs. For example, in calcium nitrate (Ca(NO3)2), the polyatomic nitrate group (NO3) is present two times.
How should more than one polyatomic ion be indicated in a chemical formula?
One reason is that the composition of a polyatomic ion is fixed, just as that of a compound is fixed. If more than one polyatomic ion is present in an ionic compound, the use of parentheses allows a subscript to be used after the right parenthesis to designate the number of ions just as such subscript is used to designate the number of atoms in a compound.
What shows the elements present in a compound?
Formula
A formula is used to represent what in chemistry?
A formula in chemistry is used to represent the composition of a compound in terms of the types and numbers of atoms present. It provides information about the elements present, their proportions, and the arrangement of atoms within the compound. Formulas can be used to predict the properties and behavior of substances.
What is the sum if the masses of the atoms present in the formula of an ionic compound?
The sum of the masses of the atoms in an ionic compound is equal to the formula mass of the compound. It is calculated by adding the atomic masses of all the atoms present in the formula unit.
What does a chemical formula present?
The chemical formula is representative for the chemical composition of a compound.
