6.7.4 Find the missing angle measure.
B
160°
143°
F
51°
1250
1330
D
0
The measure of the missing angle is
(Type an integer or a fraction.)

x = 108°

Step-by-step explanation:

Formula to determine the sum of interior angles of a polygon is,

Sum of interior angles = (n - 2) × 180°

Here, n = Number of sides of the polygon

From the picture attached,

Number of sides 'n' = 6

m∠A + m∠B + m∠C + m∠D + m∠E + m∠F = (6 - 2) × 180°

143° + 160° + 51° + 133° + 125° + x° = 720°

612° + x° = 720°

x = 720 - 612

x = 108°

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.