science

4. / Non-metals in group 17 in the periodic table, fluorine,chlorine, bromine and iodine.
6. / Positively charged centre of the atom made up of protons and neutrons.
7. / The element in group 8 and period 4.
8. / The third most abundant element in the cosmos,after hydrogen and helious.
9. / A soft, silver-white metal belonging to the alkali metal group of chemical element.
12. / The first of the synthetic element.
13. / Charged particle made up of several non metallic atoms joined together.
14. /_____for removing and holding a hot beaker.
18. / ____are used to pick up small object.
20. / Compound produced in a neutralization reaction between an acid and a base.
22. / ....mixture is one that has uniform composition and the same properties throughout the mixture.
24. / Ability of a substance to conduct heat,sound or electricity.
25. / Determined without destroying matter.
28. / an alkaline battery.
29. / Type of bond formed when electrons transfer between metals and non-metals.
30. / The largest naturally occuring element.

1. / A substance that cannot be broken down into simpler components by any non-nuclear chemical reaction.
2. / Poor conductor of heat.
3. / an posotively charged ion.
5. / The element that has atomic number 32.
10. / Unreactive with all, but the most corrosive of acids.
11. / The element in group 3 to 12 are referred to as ...
15. / ____ is pH changes very little when a small amount of strong acid or base is added to it.
16. / an element is defined by the nucleon number, which is the sum of the number of protons and the number of neutrons in the atomic nucleus.
17. / substances that, in aqueous solution, are slippery to the touch, taste astringent, change the color of indicators (e.g., turn red litmus paper blue),
19. / Chemical reaction in which an acid and a bases react quantitatively with each other.
21. / Chemical combination of two or more elements.
23. / ____is any chemical element which has properties between those of metal and non-metal.
26. / A change in the physical and chemical properties.
27. / a subatomic particle with a positive electric charge of +1e.