Electron Structure

whatever

100

What is the correct electron dot structure for the element Fluorine (F)?

F with 7 dots

200

What group contains the halogen family of elements?

Group 17

300

Which group contains elements with an electron configuration that ends with p3?

All elements in Group 15

400

Write the noble gas form of the electron configuration and the electron dot structure of selenium.

The noble gas form of the electron configuration of selenium is [Ar]4s24p4. Se 6 dots

500

Identify the element having the largest size and the element having the highest electronegativity from the list of electron configurations given below: a. [Ne] 3s2 3p3 b. [Ne] 3s2 3p4 c. [Ne] 3s2 3p5 d. [Ne] 3s2 3p3 4s2 3d3

Element having the largest size is D Element having the highest electronegativity is C

ionization/electronegativity

100

Which property describes how much energy must be added to an atom to remove an outermost electron?

ionization energy

200

Describe the trend of ionization energy that occurs in the periodic table.

Increases as you move across the periods and decreases as you move down the group.

300

Which element is more electronegative? Bromine, or oxygen? Why?

Oxygen. Valence shell is almost full, and will steal element's electrons to complete its shell.

400

Why do atomic radii increase as you move down a group?

Those elements contain more energy levels, so the outer electrons are futher from the nucleus and feel thus feel the pull less.

500

Why is the size of a sodium ion (Na+) less than that of a sodium atom (Na)?

The loss of an electron from a sodium atom results in a smaller radius. The electrostatic repulsion between the remaining number of electrons decreases thus allowing them to be pulled closer to the nucleus. Therefore, the size of a sodium ion (Na+) is less than that of a sodium atom (Na).

valence electrons

100

Which is the correct number of valence electrons in the element Lithium?

1

200

What is the correct electron dot diagram for the element Silicon (Si)?

Si with 4 dots around it

300

Which family of elements contains elements with two valence electrons?

Alakine Earth Metals

400

What is the most important characteristic in detemining an element’s chemical properties?

The number of valence electrons it contains

500

What is the electron configuration of chlorine and the number of valence electrons in it?

The electron configuration of chlorine is 1s22s22p63s23p5. It has 7 valence electrons

periodic table arrangement

100

By the increasing value of their atomic numbers.

How are the elements arranged in the periodic table?

200

The horizontal rows of the periodic table are called?

Periods

300

The vertical columns of the periodic table are called?

Groups

400

Name 3 groups of elements in the periodic table.

Alkali metals, Alkali earth metals, halogens, noble gases.....

500

What is the atomic number of an element?

The number of protons in its nucleus.

electron configuration

100

Which element has the electron configuration 1s22s22p63s23p64s23d4?

Chromium (Cr)

200

Which is the correct electron configuration for the element Molybdenum (Mo)?

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d4

300

Which block on the periodic table contains the actinide series of elements?

f block

400

Which is the energy level that is being filled by electrons in the transition elements of period 5?

fourth

500

Identify the period and group numbers of the element with the electron configuration. [Ne]3s23p4

Period 3, Group 16