Across
1. An atom with the same number of protons but a different number of neutrons. (8 letters)
2. The region around the nucleus where an electron is most likely to be found. (9 letters)
3. A negatively charged particle found in the electron cloud. (8 letters)
4. A subatomic particle with no charge, found in the nucleus. (8 letters)
5. The positively charged center of an atom. (7 letters)
6. The number of protons in an atom's nucleus. (8 letters)
7. An atom that has gained or lost electrons. (8 letters)
8. A diagram showing the arrangement of electrons in energy levels. (11 letters)
9. The outermost energy level of an atom. (10 letters)
10. An isotope with an unstable nucleus, undergoing radioactive decay. (11 letters)
Down
1. The number of protons and neutrons in an atom's nucleus. (10 letters)
2. The minimum amount of energy that an electron can have within an atom. (6 letters)
3. A group of elements with similar chemical properties. (7 letters)
4. The process by which an atom gains or loses electrons. (10 letters)
5. The force that holds the nucleus together. (10 letters)
6. A subatomic particle with a positive charge, found in the nucleus. (8 letters)
7. The sum of the masses of protons and neutrons in an atom. (10 letters)
8. A neutral particle that is composed of two protons and two neutrons. (6 letters)
Solution
Across
1. ISOTOPE
2. ORBITAL
3. ELECTRON
4. NEUTRON
5. NUCLEUS
6. ATOMIC NUMBER
7. ION
8. ELECTRON CONFIGURATION
9. VALENCE SHELL
10. RADIOISOTOPE
Down
1. MASS NUMBER
2. ENERGY LEVEL
3. GROUP
4. IONIZATION
5. STRONG FORCE
6. PROTON
7. ATOMIC MASS
8. ALPHA PARTICLE
