Chemistry Semester 1 Review

Question 1

says atoms tend toform bonds so each atom has 8 electrons in its energy level is

Accepted Answer

octet rule.

Question 2

The number of protons in the nucleus of an element is calledits________________________ number.

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atomic

Question 3

The density of the solution is 1.13 g/mL.

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quantitative

Question 4

Neutral atoms of the same element can differ in

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mass number.

Question 5

What is the total number of electrons needed tofill the fourth main energy level?

Accepted Answer

32

Question 6

Sharpening a pencil

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Physical Change

Question 7

To draw a Lewis structure, it is not necessary to know

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bond energies.

Question 8

An ionic bond results from electrical attractionbetween

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cations and anions

Question 9

The total number of protons and neutrons in the nucleus ofan isotope is calledits _____ number.

Accepted Answer

mass

Question 10

Most of the volume of an atom is occupied by the

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electrons

Question 11

Which of these is an example of an element?

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oxygen

Question 12

Every pure chemical compound consists of two ormore elements that

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are combined chemically.

Question 13

Thesolid dissolves in water.

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qualitative

Question 14

Atoms of one element that have different masses are called____________________________.

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isotope

Question 15

Anonpolar covalent bond is unlikely when two atoms of different elements joinbecause

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electronegativity

Question 16

Mendeleev did not list the elements in order of atomic mass b/c he wanted elements with similar

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properties

Question 17

Whenever an excited hydrogen atom returns froman excited state to its ground state, it

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emits a photon of radiation.

Question 18

melting an ice cube

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Physical Change

Question 19

The smallest particle of an element is a(n) _______.

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atom

Question 20

Electronsthat are not in the highest occupied energy level are called ____________

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inner shell electrons

Question 21

The elements with atomic # from 58 through71 in the periodic table are called the ____________.

Accepted Answer

lanthanides

Question 22

slicing a loaf of bread

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Physical Change

Question 23

Which of these is an example of a heterogeneousmixture?

Accepted Answer

mud

Question 24

Which process is a chemical change?

Accepted Answer

burning in air

Question 25

If A has a lowerfrequency than B, then compared with B, thewavelength of A is ______________.

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larger

Question 26

decomposing mercury(II) oxide

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Chemical Change

Question 27

burning a piece of paper

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Chemical Change

Question 28

A particle that has an outer main energy levelfully occupied has a _______configuration.

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noble gas

Question 29

The ________ states you can't know the velocity and the position of a particle atthe same time.

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Heisenberg uncertainty Principle

Question 30

a chemist obtained values of 5.224 g, 5.235 g,and 5.259 g. The actual is unknown. They have

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high precision

Question 31

For multiple covalent bonds to form inmolecules,the molecules must contain carbon, nitrogen, or

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oxygen

Question 32

The energy of a photon depends on the_______________________________ of the radiation.

Accepted Answer

frequency

Question 33

The electrons available to be gained, lost, orshared are called___________.

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valence electons

Question 34

[Ar]3d104s24p5.This element is in the _______________________period.

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fourth

Question 35

The temperature of the solution is 3°C.

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quantitative

Question 36

The number of valence electrons for Group 2elements is

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2

Question 37

Compared with the elements at the left ofthe p-block element group, the elements at the right

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are less metallic.

Question 38

Since the first energy level contains only 1s, the number of elements in this periodis ______.

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two

Question 39

The solution is dark blue.

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qualitative

Question 40

A new group was added to Mendeleev’s periodictable after the discovery of

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noble gases

Question 41

Chemistry is a natural science that deals withthe study of

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the composition, structure, properties andchanges of matter.

Question 42

Max Planck proposed that “hot” objects radiateenergy in small, specific amounts called

Accepted Answer

quanta

Chemistry Semester 1 Review

Questions 42

Chemistry Semester 1 Review

Questions 42