Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
27 Cards in this Set
- Front
- Back
|
Which subatomic particles have a mass of approximately 1 atomic mass unit each?
|
Protons and Neutrons
|
|
|
What happens when you go down the periodic table?
|
Valence Electrons go up
|
|
|
The major portion of an atoms mass consists of ?
|
Neutrons and Protons
|
|
|
Which of the group 17 elements listed below has the greatest nuclear charge
|
I ( Iodine )
|
|
|
The mass of 12 protons is approximately equal to
|
12 atomic mass units
|
|
|
As the number of neutrons in the nucleus of a given atom of an element increases, the atomic number of that element
|
Remains the same
|
|
|
Which statement is true about a proton and an electron
|
They have different masses and different charges
|
|
|
When the electrons of an excited atom return to a lower energy state, the energy emitted can result in the production of
|
Spectra
|
|
|
Which substance can be decomposed a by a chemical change
|
CO
|
|
|
Matter that is composed of two or more different elements chemically combined in a fixed proportion is classified as
|
a Compound
|
|
|
Which list consists of elements that have the most similar chemical properties?
|
Mg,Ca,and Ba
Magnesium ,Calcium ,Barium |
|
|
Which element is classified as a noble gas at STP
|
Neon
|
|
|
Which group contain elements in three phases of matter at STP
|
Group 17
|
|
|
Which gaseous element has the greatest density at STP
|
Cl2
|
|
|
Which element can for more than one binary compound with chlorine?
|
Fe
( Iron ) |
|
|
Tetra chloromethane , CCL4, is classified as a
|
Compound because the atoms of the elements are combined as a fixed proportion
|
|
|
Two substances, A and Z are to be identified. Substance A can not be broken down by a chemical change. What can be concluded about these substances
|
Both substances are elements
|
|
|
All atoms in a given sample of an element contain the same number of
|
Protons and Electrons
|
|
|
Which statement best describes Group 2 elements as they are considered in order from top to bottom of the Periodic Table?
|
The number of principal energy levels increases and the number of valence electrons remains the same
|
|
|
Group 1
|
Alkali Metals
|
|
|
Group 2
|
Alkaline Earth Metals
|
|
|
Group 3-12
|
Transition Metals
|
|
|
Group 17
|
Halogens
|
|
|
Group 18
|
Noble Gases
|
|
|
What is an element
|
An element is a substance consisting of atoms which all have the same number of protons
|
|
|
What is a Solution
|
Mixture of a solid and a liquid where the solid never settles out, etc. saltwater.
|
|
|
What is a Mixture
|
mixture contains two or more substances that are not chemically combined.
|
