1.16 Explain the meaning of atomic number of an element in terms of position in the periodic table and number of protons in the nucleus Flashcards
What is the atomic number of an element?
The atomic number is the number of protons in the nucleus of an element.
How are elements arranged in the periodic table?
Elements are arranged in order of atomic (proton) number and grouped by similar properties.
What are groups in the periodic table?
Groups are columns in the periodic table where elements have similar properties.
What do elements in the same group have in common?
Elements in the same group have the same number of electrons in their outer shell.
Why do elements in the same group have similar chemical properties?
They have the same number of electrons in their outer shell, which gives them similar chemical properties.
What are metals?
Metals are elements that react to form positive ions.
Majority of elements are metals.
Where are metals found on the periodic table?
Metals are found to the left and towards the bottom of the periodic table.
They lose electron(s) to form positive ions, achieving a stable electronic structure like that of a noble gas.
What are non-metals?
Non-metals are elements that do not form positive ions.
They gain electron(s) to form negative ions.
Where are non-metals found on the periodic table?
Non-metals are found towards the right and top of the periodic table.
They gain electron(s) to form negative ions, achieving a stable electronic structure like that of a noble gas.
