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Definition for Chemistry

Definitions:

1. Alkali metals: the first group on the periodic table.

2. Alkali earth metals: the second group on periodic table.

3. Halogen: the seventeenth group on the periodic table.

4. Inner transition elements: the two rows under the periodic table

5. Lanthanide series: the top row of the two rows under the periodic table.

6. Actinides series: the bottom row of the two rows under the periodic table.

7. Noble gas: the eighteenth group on the periodic table.

8. Transition elements: groups three through ten on the periodic table

9. Representative elements: groups 1A through 8A on the periodic table.

10. Chemical family: elements that are in the same category.

11. Atomic number: the number given for how many protons the element’s atom has.

12. Periodic table: a table that organizes all the elements by their atomic number.

13. Protons: the positive charged particles found in the nucleus of an elements atom.

14. Neutrons: the neutral charged particles found in the nucleus of an elements atom.

15. Electrons: the negative charged particles found in the cloud around an atoms nucleus.

16. Subatomic particle: are the particles smaller than an atom.

17. Nucleus: the middle of an atom where the protons and neutrons are found.

18. Electric charge: the charge of an atom when it’s around other atoms.

19. Valence electrons: the outer electrons on the outermost shell.

20. Atomic mass: how much the elements atom weighs.

21. Groups: the vertical lined columns on the periodic table numbered 1-18.

22. Periods: the horizontal lined rows on the periodic table numbered 1-7.

23. Metals: an element that is a good conductor of electricity and heat.

24. Non-metals: an element that is a poor conductor of electricity and heat.

25. Metalloids: an element that has properties between a metal and non-metal

26. Chemical symbol: a 1-3 letter initial for an individual element.

Sentences:

1. On a periodic table, the alkali metals are the first group from the left.

2. On a periodic table, the alkali earth metals are the second group from the left.

3. On a periodic table, the halogens, the seventeenth group, are second from the right.

4. The inner transition elements are the two rows that lie below the rest of the periodic table.

5. The lanthanides are the top row of the two rows that lie below the periodic table.

6. The actinides are the bottom row of the two rows that lie below the periodic table.

7. The noble gases are the row second to the right of the periodic table.

8. The transition elements consist of rows three through ten.

9. The representative elements consist of groups 1A through 8A on the periodic table.

10. Elements that are in the same category are a chemical family.

11. Every element has an atomic number.

12. All the elements are organized into the periodic table.

13.-15. An element’s atom consists of protons, neutrons, and electrons.

16. Subatomic particles are smaller than an atom.

17. The nucleus is in the middle of an element’s atom.

18. The electric charge is when an atom loses or gains electrons and gets a charge.

19. The valence electrons are on the outermost shell of an atom.

20. How much an atom weighs is it atomic mass.

21. Elements are in groups that are columns going vertically.

22. The rows going horizontally are called periods.

23.-24. The periodic consists of metals and non-metals.

25. Metalloids are a group of elements that make a stairs shape on the periodic table.

26. Every element has a chemical symbol that acts like an initial for the element.

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