periodic table Flashcards
What is an isotope
an isotope is an atom with the same number of protons and different amounts of neutrons
What are the elements in the periodic table listed in order of
atomic number
What is the name of the group 7 elements
halogens
How many shells of electrons does potassium have
four
Give the chemical symbol of the group 6 element in period four
Se
Which atomic model showed up most of the atom is empty space
Nuclear model
What is the state of matter of fluorine
halogen
What is the trend in melting points in group 7 elements
It gets higher as you go down
What is the relative charge of a proton
+1
What is the relative charge of a neutron
0
What is the relative charge of an electron
-1
What is the relative mass of a proton
1
What is the relative mass of a neutron
1
What is the relative mass of an electron
1/1840
What is the gas given off when lithium reacts with water
Hydrogen
what is the maximum number of electrons that fit onto the second shell
eight
What is the maximum number of electrons that fit onto the first shell
Two
What is the maximum number of electrons that fit onto the third shell
Eight
what is the maximum number of electrons that fit onto the fourth shell
18
What is the chemical symbol for tungsten
W
what is the mass number of vanadium 

51
Calcium is more reactive than magnesium true or false
True
How many electrons are there in bromine
35
What is the color of the flame produced when potassium reacts with water
lilac
What electron arrangement in sodium
two, eight, one
Which subatomic particle was not in the nuclear model
Neutron
What element is a red brown liquid
bromine
What are alkali metals stored in and why
they are stored in paraffin because they are very reactive to oxygen
What is mass number
Number of protons plus the number of neutrons
How many neutrons are there in boron
six
which metallic element is a liquid at Room temperature
Mercury
How many protons are there in the selenium
34
Why do alkali metals float on water
they are less dense
what is the state Matter of astatine
Solid
What is the white solid product when calcium reacts with water
calcium hydroxide
What is the trend in boiling points of the group 7 elements
it gets higher as you go down
How do you find the number of electrons in an element
The number of electrons in an element is the same is the atomic number of the element. for example sodium, has an atomic number of 11 which means the number of electrons is 11-
How do you find the number of protons in an element
The number of protons in an element is the same as the atomic number of the element. for example boron, Has an atomic number of five which means the number of protons is five+
How do you find the number of neutrons in an element
to find the number of neutrons in an element take away the atomic number from the mass number. for example sodium, the mass number is 23 and the atomic number is 11 to find the number of neutrons you do 23 which is the mass number take away 11 which is the atomic number
how did Mendeleev order his periodic table
Mendeleev ordered his periodic table by atomic weight. The current model of the periodic table is ordered by atomic number
