Students explain how the periodic table is arranged by atomic number into groups and periods, link an element's position to its electron arrangement and classify elements as metals, non-metals or metalloids from their properties. They use data to describe and predict trends in the alkali metals and halogens, explain why the noble gases are unreactive and balance the equation for sodium reacting with water.
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Curriculum: Texas grade levels (TEKS). We show specific outcome codes only where they have been verified against the official curriculum document.
Completed: The Periodic Table: Groups, Periods, Metals and Non-Metals
9th Grade students (typically ages 14–15) working on chemical sciences. It is pitched at level 2 · standard; a harder version is linked above.
Yes. The PDF includes a full answer sheet with model answers and success criteria where there is more than one good answer. You can also view the answers online.
About 45 minutes for 15 questions. Short, regular sessions work best: two or three a week beats one long one.
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Try Radioactivity and Half-Life: Alpha, Beta and Gamma Radiation.
Success TutoringWorksheets9th Grade · Science · Chemical SciencesName
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Group number (for groups 1 and 2) = outer electrons; period number = number of shells.
The periodic table lists the elements in order of atomic number. The vertical columns are groups and the horizontal rows are periods.
For the main groups, elements in the same group have the same number of outer-shell electrons (group 1 has 1, group 2 has 2, group 17 has 7, group 18 has a full outer shell). The period number equals the number of electron shells.
Group 1, the alkali metals, are soft metals that react quickly with water to produce a metal hydroxide and hydrogen gas. Reactivity increases down the group. Melting points (°C): lithium 181, sodium 98, potassium 63, rubidium 39.
Group 17, the halogens, are reactive non-metals made of two-atom molecules (F₂, Cl₂, Br₂, I₂). Reactivity decreases down the group. Boiling points (°C): fluorine −188, chlorine −34, bromine 59, iodine 184.
Group 18, the noble gases, such as helium, neon and argon, are colorless gases that hardly react at all.
Alkali metals and halogens are handled only by a teacher, in small amounts and with safety equipment.
Preview — the PDF contains the full resource and answer sheet.
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