What does a period and a group represent?

What does a period and a group represent?

The atomic number of each element is written above the symbol. A period is a horizontal row of the periodic table. A group is a vertical column of the periodic table, based on the organization of the outer shell electrons. There are a total of 18 groups.

What does a period number tell you?

A period in the periodic table is a horizontal row of chemical elements. All elements in a horizontal row have the same number of outermost electron shells. In the periodic table, the period number indicates the number of outermost shells and not the number of electrons, protons and neutrons.

What does the period number in the periodic table represent?

Each row represents one period; the period number of an element indicates how many of its energy levels house electrons. The elements in a group often look and behave similarly, because they have the same number of electrons in their outermost shell — the face they show to the world.

What does period no represent?

As an atom’s atomic number increases, its shells must accommodate an increasing number of electrons. The outermost shell is called the valence shell; the period number refers to this shell.

What does group number and period number indicate?

The group number in the periodic table represents number of valence electrons of the elements in a certain group.

What are the Group 7 halogens?

Chlorine, bromine and iodine are the three common Group 7 elements. Group 7 elements form salts when they react with metals. The term ‘halogen’ means ‘salt former’.

What is the symbol of magnesium?

Mg
Magnesium/Symbol

What is a period law?

: a law in chemistry: the elements when arranged in the order of their atomic numbers show a periodic variation of atomic structure and of most of their properties.

What do elements in a period have in common?

A period in the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells. Each next element in a period has one more proton and is less metallic than its predecessor.

What are the side effects of menstruation?

Menstrual period side effects. Abdominal pain, Acne, Aggression, Anxiety, Backache, Bloating, Breast swelling and tenderness,

How long is a normal period cycle?

The typical menstruation cycle lasts about 28 days, and the normal length of a period is five days.

How many days between periods?

The average menstrual cycle is about 28 days. This means that about 28 days pass between the first day of your period and the first day of your next period.

What are the symptoms of menstrual period?

Common symptoms of menstruation include bleeding, cramps, bloating and mood swings. Breast and muscle soreness or pain can be a sign of menstruation.