Ch 4 Elements and the Periodic Table

Question 1

What tells us the number of protons in the element's nucleus?

Accepted Answer

atomic number

Question 2

If something can be pulled into a wire, it is...

Accepted Answer

ductile

Question 3

What are good conductors of heat and electricity?

Accepted Answer

metals

Question 4

What information can be found in a square of the periodic table?

Accepted Answer

atomic mass, chemical symbol, atomic number, name of element

Question 5

What two groups of elements are shown at the bottom of the table?

Accepted Answer

lanthanides and actinides

Question 6

What has properties of both metals and nonmetals?

Accepted Answer

metalloid

Question 7

Do elements increase or decrease in reactivity from left to right in the periodic table?

Accepted Answer

decrease

Question 8

Do elements increase or decrease in atomic mass from left to right in the periodic table?

Accepted Answer

increase

Question 9

What is a radioactive isotope that can be followed through chemical reactions?

Accepted Answer

tracer

Question 10

Which particle is positively charged?

Accepted Answer

proton

Question 11

Do elements in the same period or same group/family have more similar properties?

Accepted Answer

group/ family

Question 12

What do the atomic mass and atomic number tell us about what is in the nucleus of an atom?

Accepted Answer

how many protons and neutrons

Question 13

What very reactive group of nonmetals gains or shares one electron in chemical reactions?

Accepted Answer

halogen

Question 14

How can an element's properties be predicted?

Accepted Answer

location in periodic table

Question 15

What are common characteristics of metals?

Accepted Answer

all of these

Question 16

What did Mendeleev create?

Accepted Answer

periodic table

Question 17

Which family is the most reactive group of metals in the periodic table?

Accepted Answer

alkali metals

Question 18

Place in order of reactivity: 1alkali metals, 2transition metals, 3halogens and 4noble gases.

Accepted Answer

4, 2, 3, 1

Question 19

What is the spontaneous emission of radiation from an unstable atomic nucleus called?

Accepted Answer

radioactivity

Question 20

What consists of two nonmetal atoms bonded together?

Accepted Answer

diatomic molecule

Question 21

How do the properties of radioactive isotopes make them useful?

Accepted Answer

used as tracers in industrial processes, energy to create electricity, radiation to kill cancer, used as tracers in diagnosing medical conditions

Question 22

Which particles are lost, gained or shared in chemical reactions?

Accepted Answer

electrons

Questions 22