Atoms, Elements And The Periodic Table Flashcards
Is the nucleus positive or negatively charged?
Positive
What are elements?
The building blocks of matter
What is the nucleus made up of?
Protons and neutrons
What electrons orbit around the nucleus ?
Light, negatively charges ones
What is the number of protons known as?
The atomic number
What is the mass of an element called?
Relative atomic mass
Where is nearly all of the atom’s mass located?
The nucleus
What are the rows and columns of the peridoic table called
Periods and groups
What is the name of the elements located in the middle of the periodic table?
Transition elements
Who developed the first useful periodic table?
Dmitri Mendeléev
Why were there gaps in Mendeléev’s periodic table?
The elements had not yet been discovered
In the periodic table, how are the elements arranged?
Atomic number
