10 11 test prep

Question 1

All ______________________ have a full set of electrons in their outermost energy levels.

Accepted Answer

Noble gasses

Question 2

smallest particle into which an element can be divided and still be the same substance

Accepted Answer

Atom

Question 3

What did Democritus, Dalton, Thomson, Rutherford, and Bohr all have in common?

Accepted Answer

contributed to development of atomic theory.

Question 4

What is an example of a chemical change?

Accepted Answer

Exploding

Question 5

If an isotope of uranium, uranium-235, has 92 protons, how many protons does uranium-238 have?

Accepted Answer

92

Question 6

How many protons does an atom with an atomic number of 23 and a mass number of 51 have?

Accepted Answer

23

Question 7

The vertical column of elements on the periodic table is called a(n)

Accepted Answer

group

Question 8

These elements are usually dull and brittle:

Accepted Answer

Non Metals

Question 9

Which of the following statements about alkali metals is true?

Accepted Answer

Alkali metals are Group 1 elements., Alkali metals are rarely found in their uncombined form.

Question 10

What should you look at when measuring volume in a graduated cylinder?

Accepted Answer

The Meniscus

Question 11

What is the formula for calculating density?

Accepted Answer

M\V

Question 12

In which state of matter are atoms moving the fastest?

Accepted Answer

Gas

Question 13

What does a triple beam balance measure?

Accepted Answer

Mass

Question 14

What subatomic particle makes an ion?

Accepted Answer

electron

Question 15

Mendeleev found that properties of the known elements followed a pattern that repeated every

Accepted Answer

7 elements

Question 16

Which group contains elements whose atoms have six electrons in their outer

Accepted Answer

Group 16

Question 17

An atom of a(n) ______________________ has one electron in its outermost energy level.

Accepted Answer

alkali metal

Question 18

Which of the following statements about elements is true?

Accepted Answer

Each element has a unique atomic number.

Question 19

In Thomson’s “plum-pudding” model of the atom, the plums represent

Accepted Answer

electron

Question 20

Most nonmetals are

Accepted Answer

poor conductors, dull and brittle

Question 21

Which of the following statements about the periodic table is false?

Accepted Answer

elements at the far left of the periodic table are nonmetals

Question 22

Periodic means:

Accepted Answer

Happening at regular intervals

Question 23

Which of the following scientists discovered that atoms contain electrons?

Accepted Answer

Thomson

Question 24

Which of the following elements should be the best conductor of electric current?

Accepted Answer

alluminum

Question 25

The elements in groups 3-12 are called:

Accepted Answer

Transition metals

Question 26

Mendeleev’s periodic table was useful because it

Accepted Answer

allowed for prediction of properties of missing elements.

Question 27

What part of an atom makes an isotope?

Accepted Answer

Nuetron

Question 28

Most nonmetals are:

Accepted Answer

poor conductors of electricity

Question 29

How would you describe the nucleus of an atom?

Accepted Answer

dense, positively charged

Question 30

The discovery of which particle proved that the atom is not indivisible?

Accepted Answer

nucleus

Question 31

Periodic law states that:

Accepted Answer

properties change periodically w/ elements’ atomic #.

Question 32

An atom’s ______________________ is equal to the number of protons in its nucleus.

Accepted Answer

atomic number

Question 33

Which of the following determines the identity of an atom?

Accepted Answer

atomic number

Question 34

What subatomic particles make up the mass of a isotope?

Accepted Answer

neutron and proton

Question 35

What is necessary for substances to burn?

Accepted Answer

oxygen

Question 36

Which state of matter changes volume and shape?

Accepted Answer

Gas

10 11 test prep

Questions 36

10 11 test prep

Questions 36