Question

using the data on the periodic table provided, which of the following statements is true? the number of valence electrons increase going from left to right because were adding an electron to the outer - most energy level. all of the transition metals are solids because they have more in common with metals than non - metals. the noble gases are found on the right side of the periodic table because that is where non - metals are found. all metals form negative ions because they give up electrons to form bonds in a compound.

Explanation:

1. First statement: As we move from left - to - right across a period in the periodic table, the number of valence electrons in the outermost energy level increases. For example, in period 2, lithium (Li) has 1 valence electron and neon (Ne) has 8 valence electrons.
2. Second statement: Not all transition metals are solids at room - temperature. Mercury (Hg) is a liquid transition metal. Also, transition metals have different properties compared to non - metals, and this statement's explanation about their relationship is incorrect.
3. Third statement: Noble gases are located in Group 18 on the right - hand side of the periodic table. This is because they have a full outer shell of electrons and are chemically inert.
4. Fourth statement: Metals form positive ions (cations) because they lose electrons to achieve a stable electron configuration, not negative ions.

Answer:

The number of valence electrons increase going from left to right because we're adding an electron to the outer most energy level.