chemistry

5. A chemical element with atomic number 28, symbol Ni. The simple body nickel is a metal
6. A chemical element with the atomic number 79, symbol Au. The simple body gold is a noble, precious metal whose color is golden yellow
7. A chemical element with the symbol Pu and atomic number 94. Radioactive metal of the actinide group
10. A chemical element with atomic number 92, symbol U. It is of the actinide family. It is a very long-life radioactive heavy metal
11. a positive particle
12. A chemical element with atomic number 29, symbol Cu. The simple body copper is a metal
13. A chemical element with atomic number 55, symbol Cs, the most alkaline of the alkali metals
15. the center of an atom
16. It is the ninth most abundant element in the universe. As a result from the successive sum of three helium nuclei to one carbon nucleus
17. chemical element with the symbol Be and atomic number 4. The best known gemstones from it are the emerald and the aquamarine
20. a neural particle

1. A set of at least two atoms
2. A chemical element with atomic number 24, symbol Cr. Its single element is a transition metal
3. Silver is the chemical element with atomic number 47, symbol Ag. Between copper and gold. Hardly or not oxidisable in air, all three are used to mint coins
4. a molecule associated with an element
7. An altomic element with atomic number 19, symbol K, alkali metal found in potash
8. A chemical element with atomic number 26, symbol Fe. The simple body is the most common ferromagnetic metal and material in everyday life, most frequently made of various alloys
9. A chemical element with atomic number 56, symbol Ba. Properties similar to those of lime
14. A chemical element with atomic number 20, symbol Ca. It is the fifth most profuse element in the earth’s crust
18. A negatively charged particle
19. A chemical element with atomic number 3, symbol Li. It is an alkali metal