Without looking at the table, write the element that has atomic numbers: a) 6 b) 12 c) 17 d) 36

Find these symbols and write their atomic numbers: — Na — C — Fe — Kr

Mira H, He, C y Ne. Enuméralos de más ligero a más pesado por masa atómica, y luego rodea los dos más cercanos en masa.

Choose two elements whose atomic masses are not whole numbers (for example, Cl ≈ 35.45, Cu ≈ 63.55). In one sentence, explain why their masses are not whole numbers.

Which has more protons: S (sulfur) or Si (silicon)? By how many?

a) What group is chlorine (Cl) in? b) What shared property do all the elements in group 17 have? c) Name another element in group 17.

In period 3 (Na → Ar), how does the atomic mass change from Na to Ar? Choose two elements from that row and describe the pattern.

For the element K (potassium) box: — Identify its group and period. — Predict whether it is very reactive or stable, and why.

Have a Andy choose 3 random boxes. For each one, complete: Atomic number, Symbol and name, Atomic mass, Group and period, Prediction of reactivity.

a) Atomic number 1 → what element? b) Atomic number 10 → what symbol? c) Symbol "Mg" → what atomic number? d) Which has more protons, Li or Be?

Compare two elements with the same period but different groups (for example, C vs. Ne). Which one has the highest atomic mass? Which one has more protons? What does that tell you?

In teams, compete to identify: — The element with an atomic mass closest to 50 — The element whose name starts with "Zr" — The element in group 2, period 4. The first team to read all three correctly wins!

Why are the elements of group 18 called "noble gases"? Choose one (He or Ar), read its box, and explain in your own words why it is unreactive.

Without looking, estimate the atomic mass of Ca (calcium). Then check the box, how close were you? What factors explain the discrepancy?

Complete this mini-diagram of the table: Family Typical valence electrons General behavior Group 1 (Alkali metals) Group 2 (Alkaline earth metals) Group 17 (Halogens) Group 18 (Noble gases)

Use the digital periodic table annotation tool to highlight all the metals. Then list their symbols in order of increasing atomic number.

Starting from Li (3), list the following five elements in order of atomic number and write a property (metal/non-metal) for each one.

After exploring, answer: — What surprised you about how atomic mass and atomic number are related? — How does the group number help predict chemical behavior?

Close your periodic table and write from memory: a) The symbol of element 29 and its atomic number b) The group and period of element 20 c) Two traits of transition metals.