Properties of Periodic Tab
How many groups and periods are there on the periodic table?
There are 18 groups and 7 periods on the periodic table.
What are valence electrons?
Electron in the atomś outermost orbital.
Which of these elements has the largest atomic radius
potassium
What is the atomic number for an element with three protons?
3
is the earth round ?
the earth is flat
Why do elements of the same group have similar properties?
Because of their valance electrons
What are core electrons
Electrons not in the outermost shell.
Which has the elements has the smallest atomic radius
Krypton
The atomic mass of an element is the ___.
weighted average of the masses of the isotopes of the element.
how do plants make food
photosynthesis
What is the periodic table and how is it arranged?
By the increase of their atomic number.
What are lewis diagrams?
Dots that represent two valence electrons.
Which has the greater electronegativity?
Cl or Al?
Cl
24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
What is the average mass of this element?
74.92 amu
whats better fotnite or csgo
rainbow 6 siege
What is the Actinide Series?
group of radioactive and unstable elements.
Lone pairs are paired electrons not included in covalent bonds.
AR
KR
HE
RN
RN
How many electrons are in an atom that has an atomic number of 34, an atomic mass of 74 and a charge of -2?
36
whats the mass of uranium
the mass of 238
Where are elements most reactive on the periodic table?
Metals are most reactive to the lower left and non-metals are most reactive to the upper right.
what do the electron dot structure consist of?
consists of the element's symbol representing the nucleus, surrounded by dots representing the element's valence electrons.
Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.
INCREASES AND DECREASES
Calculate the average atomic mass of the element iron (Fe) using the following data:
[Isotope / % abundance]
[Iron 54 / 6% ] [Iron 56 / 92% ] [ Iron 57 / 2% ]
55.9 amu
who was the bad guy in frozen for the first 30 min
Queen Elsa