Which polynomial is in standard form? 4xy+ 3x^3 5y - 2xy +4x^7y^92x+y^7+7y-8x²y^5– 12xy^25x^5 - 9x^2y^2 - 3xy^3 + 6y^57x^7y^2+5x^11y^5-3xy^2+2 asap plz

option 3 is the answer

Step-by-step explanation:

A polynomial  in two variables is said to be in standard form if exponent of one variable is keep decreasing  and another variable keep increasing

only option 3 follows it

As here exponent of x start from 5 and decreases up to 0

and exponent of y start from 0 and keep increasing up to 5

rest of the option do not follow this rule

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.