Physics

2. electrons are _____ (another word for really, really small)
6. the longer lengths of microwaves are used for communication in m_______
7. this type of EM light includes red, orange, yellow, green, blue, indigo, and violet colours
10. this is the EM wave from the sun that can cause burns and skin cancer
11. gamma, x-rays and some wavelengths of UV can cause this disease
12. this EM wavelength is all about heat - cooking in ovens, or used in heat sensor cameras
14. the relative mass of protons and neutrons is the s____
16. the overall charge of the nucleus of an atom because of whats in it
19. electrons are found in these, floating around the nucleus
20. this type of EM wave is used to see bones or inside luggage
21. the _____ number gives information about the number of protons
22. if an atom has _________ electrons it is a negatively charged ion
25. the most penetrating radiation - is also an electromagnetic wave

1. is it higher or lower frequencies of EM waves that are the most dangerous?
3. if an atom has ____ electrons it is a positively charged ion
4. these subatomic particles have a neutral (or no) charge
5. isotopes of the same element have ______ numbers of neutrons
8. the subatomic particles in an atom that have a negative charge
9. these EM waves can heat water in up to 1cm of food
13. where protons and neutrons are found in an atom
15. the _____ number gives information about the number of protons and neutrons
16. the subatomic particles in an atom that have a positive charge
17. an atom that has lost or gained electrons is called this
18. elements with the same protons and electrons but different neutrons are called this
23. the least penetrating, most ionising radiation - found in smoke alarms
24. ultraviolet can sterilise _____ if it is left out in the sun