Chapter 4-5

Question 1

Where are the electrons located according to our modern theory?

Accepted Answer

Clouds outside Nucleus

Question 2

which group has the most reactive metals in it

Accepted Answer

alkali metals

Question 3

Which of the following is not a particle found in the nucleus

Accepted Answer

Electrons

Question 4

how many electrons will an atom of Radon have?

Accepted Answer

86

Question 5

Which of the following is not found on the periodic table?

Accepted Answer

the density of each element

Question 6

Where in the atom is most of the mass?

Accepted Answer

In the Nucleus

Question 7

how do we determine how many neutrons an atom of a certain element has?

Accepted Answer

Atomic mass - atomic number

Question 8

Why are atoms neutrally charged

Accepted Answer

Equal # of Protons and Electrons

Question 9

Are all atoms of the same element exactly the same?

Accepted Answer

Yes

Question 10

How many protons does an atom with an atomic number of 24 and a mass number of 51 have?

Accepted Answer

24

Question 11

What is the mass of a Proton?

Accepted Answer

1 amu

Question 12

Which of the following determines the identity of an element?

Accepted Answer

atomic number

Question 13

The atom is named for the Greek word _____ which means indivisible.

Accepted Answer

Atomos

Question 14

how many valence electrons does every element group 16 (Oxygen Group) have?

Accepted Answer

6

Question 15

Elements in the same vertical column in the periodic table belong to the same ______.

Accepted Answer

group

Question 16

What is the charge on an electron?

Accepted Answer

Negative

Question 17

What is the of group 2 of our periodic table?

Accepted Answer

Alkali earth metals

Question 18

An element that is very unreactive would most likely be a member of the ________.

Accepted Answer

noble gases

Question 19

what is the name for the rows on the periodic table?

Accepted Answer

Period

Question 20

Which is a particle found in the nucleus that has a positive charge?

Accepted Answer

Protons

Questions 20