1 4 the periodic table

True. Elements with similar properties are arranged in the same group on the Periodic Table.

A group is a vertical column on the Periodic Table.

True. The number of electrons in an atom changes during chemical reactions.

Periods indicate the number of electron shells in an atom.

Elements are arranged by increasing atomic number in periods and groups.

True. Each element has one proton more than the previous one.

A period is a horizontal row on the Periodic Table.

Elements are arranged by increasing atomic number so that they end up in columns with similar properties.

Groups indicate the number of outer electrons in an atom.

Silicon has 3 electron shells and 4 outer electrons .

An electronic configuration is the arrangement of electrons in shells.

True. Electrons occupy the shell closest to the nucleus first.

The first shell can hold a maximum of 2 electrons.

The group gives the number of outer electrons.

True. Chlorine has 3 shells of electrons.

The last number in an electronic configuration represents the number of outer electrons.

The second and third shells can each hold a maximum of 8 electrons.

In terms of electrons, other words for shell include:

False. Most elements do not have full outer shells of electrons.

The electronic configuration of sulfur is 2, 8, 6.

True. Non-metals are poor conductors of heat and electricity.

True. Most elements are metals.

In terms of their physical state at room temperature, metals are typically solid and non-metals can be gases or solids. Mercury and bromine are exceptions as they are liquid at room temperature.

Properties that are used to classify elements as metals or non-metals include:

False. Non-metals are typically brittle, while metals are typically malleable and ductile.

Non-metals are generally located on the right-hand side of the Periodic Table.

Metals normally form basic oxides.

Non-metals generally have low melting and boiling points.

False. Non-metals do not generally react with acids.

Metals typically have high electrical conductivity, are malleable / ductile, react with acids and form basic oxides. Non-metals typically have lower electrical conductivity, are brittle, do not react with acids and form acidic oxides.

False. Elements in the same group have similar chemical properties because they have the same number of outer electrons.

Elements in the same group have similar chemical properties because they have the same number of outer electrons.

True. Helium has only one shell of electrons - the first and innermost shell, which holds only 2 electrons.

A noble gas:

The noble gases are unreactive because they have a full outer shell of electrons, which is an extremely stable electronic configuration.

The Group 1 metals become more reactive as you move down the group.

Group 7 elements become less reactive as you move down the group.

True. Noble gases have full outer shells of electrons.

Neon's electronic configuration is 2, 8.