Across
1 Isotope of hydrogen with
one neutron. (9)
6 When two atoms of
different elements
combine chemically, what
does it produce? (7)
7 The lightest element. (8)
8 Elements that lend
electrons in chemical
reactions. (5)
9 A nuclear reaction in
which the nucleus of two
atoms combine to form
one nucleus. (6)
11 Helium, neon, argon, or
krypton. (5,3)
13 Where electrons reside in
the atom. (5)
15 The most common isotope
of carbon. (6,6)
16 The isotope of carbon that
is used for dating things in
archeology. (6,8)
17 Elements that borrow
electrons in chemical
reactions. (8)
Down
2 An atom of an element with a different number of neutrons in
the nucleus. (7)
3 Unstable. (11)
4 Positively charged particle in the nucleus. (6)
5 The center of an atom. (7)
9 A nuclear reaction in which an atom's nucleus splits to form two
new atoms. (7)
10 Negatively charged particle. (8)
12 Isotope of hydrogen with two neutrons. (7)
14 Particle with no charge. (7)