## What group has the lowest electronegativity values in a period?

The electronegativity also increases up a group (column) of the periodic table. Lithium 1.0 and Francium 0.7 in Group I. Therefore Francium (Fr) in the lower left Group I Period 7 has the lowest electronegativity value at 0.7 and Fluorine (F) upper right Group 17 Period 2 has the highest electronegativity value at 4.0.

## Why does Group 1 have the lowest electronegativity?

As the metal atoms increase in size, any bonding electron pair becomes farther from the metal nucleus, and so is less strongly attracted towards it. This corresponds with a decrease in electronegativity down Group 1.

## What happens when atomic number increases?

As the atomic number increases along each row of the periodic table, the additional electrons go into the same outermost shell, causing the atomic radius to decrease due to the increasing nuclear charge.

## Why does increasing the number of protons decreases the atomic radius?

Thus, the positive charge increases due to the number of positive protons increasing in the nucleus. The strong positive charge of the nucleus has a strong pull on the negatively charged electron cloud. This causes the atom’s radius to decrease in size as it is pulled inward.

## What is meant by the atomic radius?

Atomic radius: The radius of an atom. This distance between an atom’s nucleus and outer electron shell. Atomic radius differs with the bonding state of an atom (for example an nonbonded atom of an element versus the same element within a covalent bond).

## Which period is most electronegative?

In Period 3, sodium with 11 protons is the least electronegative element, and chlorine with 17 protons is the most electronegative element. You might expect argon (with 18 electrons) to be the most electronegative element in Period 3.

Wavelength

## Does energy increase with frequency?

The shorter the wavelengths and higher the frequency corresponds with greater energy. So the longer the wavelengths and lower the frequency results in lower energy. The energy equation is E = hν. The energy equation is a direct relationship between frequency and energy because as frequency increases, so does energy.

## What wavelength are colors?

A spectrally pure or monochromatic color can be produced by a single wavelength. For example, an orange color is associated with a wavelength of 600 nm….Nature of Color.

Spectral region Range of wavelength in nm Subregion
Visible 380-430 430-500 500-520 520-565 565-580 580-625 625-740 Violet Blue Cyan Green Yellow Orange Red