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What causes the trend of electronegativity?

The positively charged protons in the nucleus attract the negatively charged electrons. As the number of protons in the nucleus increases, the electronegativity or attraction will increase. Therefore electronegativity increases from left to right in a row in the periodic table.

What is the trend of electronegativity as you move across a period quizlet?

Electronegativity increases as you move from left to right across a period because the number of charges on the nucleus increases. As you move down a group (column), electronegativity decreases (as you move up, it increases) due to the distance between the nucleus and the valence electron shell.

Why does electronegativity generally decrease as you go down a group on the periodic table?

From top to bottom down a group, electronegativity decreases. This is because atomic number increases down a group, and thus there is an increased distance between the valence electrons and nucleus, or a greater atomic radius.

How does electronegativity vary across a period and down a group?

Electronegativity increases across a period while it decreases down a group. Atomic radius increases down the group due to addition of new shell. Due to this the distance between nucleus and valence shell increases. And the nuclear attractions on the valence shell decrease hence electronegativity decreases.

What happens to the electronegativity values across each period from left to right?

On the periodic table, electronegativity generally increases as you move from left to right across a period and decreases as you move down a group. As a result, the most electronegative elements are found on the top right of the periodic table, while the least electronegative elements are found on the bottom left.

Which of the following elements would be expected to have the highest electronegativity?

Thus, fluorine is the most electronegative element, while francium is one of the least electronegative. (Helium, neon, and argon are not listed in the Pauling electronegativity scale, although in the Allred-Rochow scale, helium has the highest electronegativity.)

Why is chlorine The most electronegative element in period 3?

Electronegativity is the ability of an atom to attract the bonding electrons in a covalent bond. The table gives values on the Pauling scale, which have no units. Fluorine (3.98) is the most electronegative element….Electronegativity.

Element chlorine
Symbol Cl
Atomic number 17
Electronegativity 3.16

Which is the most electropositive element in 2nd period?

In the second period, the most electronegative and electropositive elements are fluorine and lithium respectively.

Is there a gas that is lighter than helium?

Because helium is lighter that air, a helium balloon rises, just as an air bubble rises in more dense water. Hydrogen is another gas lighter than air; it’s even lighter than helium.

What turns from solid to liquid?

Melting. When a solid is heated to its melting point, it changes into a liquid.