| Across: |
| 1 |
the positive particle in the nucleus of an atom |
| 8 |
manganese has a mass of 55 and atomic number 25, how many electrons? |
| 10 |
very reactive metals (5,1) |
| 11 |
electrons of the 19th element (1,1,1,1) |
| 12 |
number of neutrons in an atom of mass 9 and atomic number 5 |
| 13 |
horizontal row of elements using three shells (6,1) |
| 14 |
atoms with the same number of protons but different mass and neutron numbers |
| 17 |
the centre of an atom |
| 19 |
maximum electrons in 2nd shell |
| 22 |
charge on the electron |
| 23 |
group containing the 4th element |
| 25 |
number of electrons in the atom fluorine, a halogen element in group 7
|
| 26 |
the atomic number of fluorine |
| 28 |
green gas with seven outer electrons |
| 29 |
a glowing gas and a full shell job! |
| 30 |
group of the element of atomic number 5 |
|
| Down: |
| 1 |
charge on the proton |
| 2 |
the neutral particle in an atom |
| 3 |
atomic number 11 and sizzles well on water (1,1,1) |
| 4 |
argon, very unreactive due to its electron structure (1,1,1) |
| 5 |
mass of atom with 12 electrons and 13 neutrons |
| 6 |
The group containing the 20th element |
| 7 |
the number of outer electrons in the element of atomic number 13 |
| 8 |
atom of mass 40 and atomic number 19, number of neutrons? |
| 9 |
the number of outer electrons at the end of period 2 onwards? |
| 11 |
atomic number 13 (1,1,1) |
| 12 |
the 7th element is in this group |
| 15 |
reactive metal with one outer electron |
| 16 |
a physical descriptor of the group 1 reactive metals |
| 18 |
a negative particle |
| 20 |
this has 7 outer electrons and gives purple diatomic molecules on heating |
| 21 |
charge on the neutron |
| 24 |
the group number of the alkali metals |
| 27 |
the number of neutrons in the hydrogen atom of mass 1
|
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CROSSWORD on
ATOMIC STRUCTURE, ISOTOPES and ELECTRONIC STRUCTURE