Electromagnetic fields and therefore waves are generated orthogonal to the electric current that generated it.
The food will be healthier and fresh, but due to it being fresh it will cost more, about a two dollars more than the average price for the unhealthy meal
The microscope. It allowed for scientists to observe the tiny parts of cells since they are not visible to the naked eye.
Answer:
1678
Explanation:
In 1678, Antoni van Leeuwenhoek reported that he had observed "little animals" — protozoa — through a microscope. The discovery of the cell was made possible by the invention of the microscope, which was made possible by improved lens-grinding techniques.
Answer: seven
Explanation: the valence electrons are the numi of electrons found in the outermost shell of an element. The group of an element indicates it's number of electrons in the outermost shell while the number of shells occupied by electrons indicates the period.
Thus since the element is in group seven it has seven valence electrons.
