Answer:
Any law or theory needs to do two things to give them credibility: explain and predict.
Most laws and theories attempt to explain, some better than others. Many theories do not have predictive power, although we would expect all laws should have strong predictive powers. The stronger the predictive power of a theory the better the theory will be.
Explanation:
Answer:
It allows chemists to deal with a large number of atoms.
Explanation:
Instead of saying 6.022 x 10 ^23 atoms, chemists can say that is one mole, allowing bigger numbers of atoms to be more easily attained.
Explanation:
Metals and non-metals can be identified either by their position in the periodic table or by their properties.
he metal elements are found on the left hand side of the periodic table, and the non-metal elements are found on the right. You can imagine a zig-zag line, starting at B-Al-Si, separating metals from non-metals.
El hidrógeno es el elemento químico de número atómico 1, representado por el símbolo H. Con una masa atómica de 1.00784 u es el más ligero de la tabla periódica de los elementos. Por lo general, se presenta en su forma molecular, formando el gas diatómico H₂ en condiciones normales.
A model shows the precise way something is. It helps people understand what you are showing or telling them.