Chapter 17 SG

Chapter 17 Study Guide alkali metal alkaline-earth metal atomic mass atomic number atomic symbol electromagnetic force Key Term

Name gravitational force electron element halogen hydrogen isotope

mass number metal metalloid neutron noble gas nucleus

periodic table proton strong force transition metal weak force

1.

Definition total number of particles in nucleus; used to identify isotopes

2.

a count of the number of protons in the atomic nucleus

3.

an electrically neutral subatomic particle of the atomic nucleus

4.

an abbreviation for an element or an atom

5.

an element that has some properties of metals & some of nonmetals

6.

the mass of an element’s atoms listed in the periodic table as an average value

7.

an extremely small, negatively charged subatomic particle that surrounds the nucleus

8.

a fundamental material consisting of only 1 type of atom

9.

the most reactive metals with 1 outer electron

10.

atoms of the same element whose nuclei contain the same number of protons but different numbers of neutrons.

11.

an element that is shiny, opaque, and able to conduct electricity and heat.

12.

the dense center of every atom.

13.

responsible for changing a neutron into a proton & electron

14.

the only element without neutrons; most common in universe

15.

responsible for holding electrons around the nucleus

16.

a chart in which all known elements are organized by their properties

17.

very reactive nonmetal with 7 outer electrons

18.

responsible for holding the nucleus together

19.

very reactive metals with 2 outer electrons

20.

elements in groups 3-12

21.

force that depends on mass & distance between objects

22.

unreactive elements with 8 outer electrons

23.

a positively charged subatomic particle of the atomic nucleus.

24.

are the lightest particles in an atom, while the

is the heaviest.

What is it?

Location on Periodic Table

25. Atomic Symbol 26. Atomic Number 27. Atomic Mass 28. Mass Number Isotopes 29. Isotopes contain the same number of

and

, but different

.

30. Carbon-14 and Carbon-16 are isotopes. They both have ___ protons and ___ electrons, which are .

determined by looking at the 31. The numbers 14 and 16 refer to the

number, or the number of

32. To find the number of neutrons, subtract the number of

.

from the

.

33. Therefore, Carbon-14 has ___ neutrons and Carbon-16 has ___ neutrons. Periodic Table Trends , or vertical columns, contain the same properties.

34. 35. Atomic size gets

moving from left to right.

36. All metals are found on the

side of the periodic table. side of the periodic table.

37. All nonmetals are found on the 38. All metalloids are found along the

.

39. Identify all the metalloids: Group # 40. 1

Group Name

# of Metals

# of Nonmetals

# of Metalloids

# Outer Electrons

41. 2 42. 3-12 43. 13 44. 14 45. 15 46. 16 47. 17 48. 18 49. Hydrogen is classified as a

. It has ___ outer electron(s). It has __ proton(s), ___ electron(s),

and ___ neutron(s). It is considered ___________ reactive and is found in many 50.

is the only noble gas with 2 outer electrons.

.