Metals/Nonmetals/Reactivity

4. Sodium reacts with water. Which element is most likely to have a similar effect to sodium if it is exposed to water?

lithium

22. Which elements would have similar properties to those of potassium?

lithium and sodium

15. Which elements will most likely gain electrons?

Cl

9. Which best explains how elements are arranged on the modern periodic table?

Elements are arranged from fewest protons to most protons

24. Which is the most reactive group of nonmetals?

Group 17

11. In which groups did Mendeleev most likely place highly reactive elements?

IA and VIIA

26. Which property of sodium (Na) is true at room temperature?

It is a solid metal

12. What best describes the reactivity of alkali metals?

Reactivity increases from left to right across a period

5. Why are certain elements placed into the same column on the periodic table?

They have the same number of electrons in their nuclei.

6. What is the significance of metalloids in the periodic table?

They separate metals from nonmetals.

23. Which element is in the same family as chlorine (Cl) and fluorine (F)?

bromine (Br)

25. Which best explains how the periodic table is used to identify properties of elements?

by the group in which the elements are located

14. Which subatomic particles determine the reactivity of groups of elements in the periodic table?

electrons

8. Which elements are most likely to react in the same manner in a chemical reaction?

elements in the same group

16. Which element has 7 valence electrons?

fluorine (F)

3. What physical property is characteristic of all of the elements in the group located in the rightmost column of the periodic table?

gas state at room temperature

20. Which would sink first when placed in water?

gold

10. Where on the periodic table are you most likely to find elements that do not react with other elements?

group 18

21. How are elements on the periodic table organized by their properties?

in groups

13. Which property is unique for each element?

mass number

18. Which elements are the least reactive on the periodic table?

noble gases

7. If an element has no electrons to share and is stable, what family is it found in?

noble gases

17. What do atomic numbers represent?

number of protons

19. Where would the most reactive metallic elements of the periodic table most likely be found?

on the far left side of the table

2. Where are the most reactive metals located on the periodic table?

the column at the far left side of the table

1. Where are the most reactive nonmetals located on the periodic table?

the second column from the right side of the table