Atomic Structure and the Periodic Table Flashcards
What is the charge of a proton?
Positive (1+)
Elements contain more than one type of atom. TRUE or FALSE?
False
Give the formula for carbon dioxide.
CO2
Give the formula for sodium carbonate.
NaCO3
Balance this equation…
Mg + O2 > MgO
2Mg + O2 > 2MgO
What is the difference between a compound and a mixture?
A compound is multiple elements that have been chemically bonded together.
Which method of separation would be useful to separate an insoluble solid from a liquid?
Filtration.
Which method of separation would be useful to separate a soluble solid from a liquid?
Evaporation
Which method of distillation would be used to separate liquids with similar boiling points?
Fractional distillation
Who discovered that the plum pudding model was wrong?
Rutherford
Why did Mendeleev leave gaps in the Periodic Table of Elements?
Because he hadn’t discovered all the elements yet.
How are the group number and the number of electrons on the outer shell linked?
They are the same e.g. a group one element would have one electron on the outer shell
What kind of ions do metals form?
Positive ions.
Where are non-metals in the periodic table?
The right side.
Stare three trends as you go down group 1.
Boiling point decreases
Relative atomic number increases
Reactivity increases
