Page 21 - Big Ideas Year 10 sciPAD 2025
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SCIPAD - BIG IDEAS - BOOK 2
NATURE OF THE ATOM
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3 4 5 6
7 8 9
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11 12 13
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15 16 17
18 19
20 21
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24 25
26
Across
4. Mg
5. Number of atoms in one molecule of h20
7. Basic building blocks of all matter
11. An atom which has gained or lost
electrons and has become charged,
13. Table used to arrange all the known
elements.
14. Particles inside the nucleus of an atom
that have no charge.
15. A change in an objects state (i.e.solid
turning to liquid)
18. negatively charged particle that orbits
the nucleus of an atom
20. This element has an atomic number of 6.
21. This poisonous gas is given the chemical
symbol 'Cl'.
22. This element is given the chemical symbol
'Al'.
Down
1. Name for the 'ingredient' of a chemical
reaction.
2. Li
3. Positively charged particle inside an atom
6. Number of electrons in a sodium atom
8. This type of change results in new
substances being formed.
9. The lightest element on the periodic table
10. This number, found above an element on
the perioidc table, tell you the number of
protons inside that atom.
12. This element has an electron arrangment
of 2.8
15. Name for the substances that are
produced in a chemical reaction.
16. Used to show the direction of a chemical
reaction when writing word equations.
Across
4. Mg.
5. Number of atoms in one molecule of H2O.
7. Basic building block of all matter.
11. An atom which has gained or lost electrons and
has become charged.
13. Table used to arrange all the known elements.
14. Particles inside the nucleus of an atom that have
no charge.
15. A change in an object’s state (e.g. solid turning
to liquid).
18. Negatively charged particle that surrounds the
nucleus of an atom.
20. This element has an atomic number of 6.
21. This poisonous gas has the chemical formula
‘Cl2’.
22. This element is given the chemical symbol ‘Al’.
24. This soft metal may explode if it comes in contact
with water. Chemical symbol ‘K’.
25. The centre of an atom.
26. The symbol for this metal is based on it’s Latin
name, “plumbum”.
Down
1. Name for the ‘ingredients’ of a chemical
reaction.
2. Li.
3. Positively charged particle inside an atom.
6. Number of electrons in a sodium atom.
8. This type of change results in new substances
being formed.
9. The lightest element on the Periodic Table.
10. Found above an element on the Periodic Table,
this number tells you the number of protons
inside that atom.
12. This element has an electron arrangement of
2,8.
15. Name for the substances that are produced in a
chemical reaction.
16. Used to show the direction of a chemical
reaction when writing word equations.
17. A substance made of only one type of atom.
19. This element has an atomic number of 8.
21. Made of two or more elements chemically
combined.
23. This element is often used to fill party balloons.
When inhaled, it makes your voice higher
pitched.
End of Chapter Puzzles
1. Use the clues to solve both the crossword and the word find (over the page).
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