Groups of the periodic table

What are alkali metals?

• Elements found in Group 1 of the periodic table, characterized by having one valence electron and being highly reactive.

• Elements found in Group 2 of the periodic table, known for their low reactivity.

• Elements that are gases at room temperature and have high electronegativity.

• Elements that are liquid at room temperature and have multiple valence electrons.

How many valence electrons do halogens have?

• 5

• 6

• 7

• 8

What is the general trend of atomic size in the periodic table?

• Atomic size increases as you move down a group and decreases as you move across a period from left to right.

• Atomic size decreases as you move down a group and increases as you move across a period from left to right.

• Atomic size remains constant as you move down a group and decreases as you move across a period from left to right.

• Atomic size increases as you move across a period and decreases as you move down a group.

What are alkaline earth metals?

• Elements in Group 1 of the periodic table with one valence electron.

• Elements in Group 2 of the periodic table with two valence electrons and less reactivity than alkali metals.

• Elements that are gases at room temperature and have high electronegativity.

• Elements that are liquid at room temperature and have no valence electrons.

What is the significance of the periodic law?

• The periodic law states that the properties of elements are a periodic function of their atomic numbers, leading to the organization of the periodic table.

• The periodic law indicates that all elements have similar properties regardless of their atomic number.

• The periodic law suggests that elements are arranged randomly in the periodic table.

• The periodic law states that the atomic mass of elements is the primary factor in their properties.

What is the common oxidation state of alkaline earth metals?

• +1

• +2

• +3

• 0

What is the role of transition metals in the periodic table?

• They are found in Groups 1-2 and are known for their high reactivity.

• They are found in Groups 3-12 and are known for their ability to form various oxidation states and colored compounds.

• They are primarily used in the production of noble gases.

• They are located in the lanthanide and actinide series and are known for their radioactive properties.

What is the atomic number of an element?

• The number of neutrons in the nucleus of an atom.

• The number of protons in the nucleus of an atom, which determines the element's identity.

• The total number of electrons in an atom.

• The mass of an atom measured in atomic mass units.

What are noble gases?

• Elements in Group 18 of the periodic table with a full valence shell

• Highly reactive elements found in nature

• Elements that are liquid at room temperature

• Metals that conduct electricity well

What is the significance of the periodic table's groups?

• They represent the atomic mass of elements.

• They are rows that contain elements with different chemical properties.

• They are columns that contain elements with similar chemical properties and the same number of valence electrons.

• They indicate the temperature at which elements change state.