How many core electrons does the element bromine have?

Which among the following are not quantized? a number of plastic bags in a box; b cars passing through a toll plaza in a day; c birds in an aviary; d flow of a river in m3/hr; e percentage of salt in a solution.

How many unpaired electrons are there in an atom of (a) phosphorus? (b) potassium? (c) plutonium (Pu)?

Where are neutrons found in an atom? Are neutrons positively charged, negatively charged, or electrically uncharged?

Without looking at data in the text, sketch a qualitative graph of the third ionization energy versus atomic number for the elements Na through Ar, and explain your graph.

When describing the electrons in an orbital, we use arrows pointing upward and downward ( and ) to indicate what property?

How are the Bohr model and the Rutherford model of the atom similar? How are they different?

How many 3d electrons are found in each of the following element? >a. nickel, Z=28 c. manganese, Z=25 vanadium, Z=23 d. iron, Z=26

The four most abundant elements by mass in the human body are oxygen, carbon, hydrogen, and nitrogen. These four elements make up about 96% of the human body. The next four most abundant elements are calcium, phosphorus, magnesium, and potassium. Excluding hydrogen, which of these elements would have the smallest size? largest size? smallest first ionization energy? largest first ionization energy?

According to the Bohr theory, which of the following would have the higher energy? a. An electron in an orbit close to the nucleus b. An electron in an orbit located farther from the nucleus