Question | Answer |
Who made the periodic table? | Dimtri Mendeleev |
Why was the table periodic? | The elements' properties repeated in a pattern |
After Moseley corrected Mendeleev's ideas, the periodic table was in order of increasing atomic _________ henceforth. | number |
When Mendeleev created the periodic table, he believed that it was in order of increasing atomic _________. | mass |
What happened to Moseley later after he corrected the periodic table? | He died in World War I |
Atomic number + neutrons = ????? | Mass number |
Why is the atom neutral? | Protons and electons are equal and their opposite charges cancel out. |
The atomic number defines an ______. | Element |
What is an ionization energy? | The energy required to remove an electron from a gaseous atom |
What is an electronegativity? | the tendency of an atom to attract electrons to itself when it is chemically combined with another element. |
Where are the metals in the Periodic table? | Left side of the staircase of the Periodic Table |
Where are the nonmetals in the Periodic Table? | Right side of the staircase on the Periodic Table |
Where are the metalloids in the Periodic table? | On the staircase of the Periodic Table |
What happens to the atomic radius if the size goes down a group? | It increases |
What happens to the atomic radius if the size is on the period, from left to right? | It decreases |
happens to the ionization energy if the size goes down the group? | It decreases |
What happens to the ionization energy if the size is on the period, from left to right? | It increases |
Which type of elements gain electrons to become stable? | Nonmetals |
Which type of elements lose electrons to become stable? | Metals |
What happens to the electronegativity, if the size goes down a group? | It decreases |
What happens to the electronegativity, if the size is on a group, from left to right? | it increases |
Where are the lanthides & actinides, in the Periodic Table? | In Period 6-7 "f" block |
Where are the transition metals on the periodic table? | In Group 3-12 |