Option d: copper.
Because copper is an element, not a mixture.
Answer:
graduated cylinder
Explanation:
It shows exact volume very precisely.
Answer is (3) both mass number and atomic number.
The notation is ₅₅¹³⁷Cs. The Cs represents the chemical symbol of Caesium element. The subscript number at the left hand side of the symbol indicates the atomic number. Hence, atomic number of Cs is 55. The superscript number at the left hand side of the symbol shows the mass number. Hence, the mass number of the Cs is 137.
Answer:
True
Explanation:
if there was nothing to avoid of objects pulling towards one another many results may happen
In Na2O, what is the oxidation state of oxygen? In Na2O oxidation state of Na is 1+