Neutral atoms of each element contain an equal number of protons and electrons. The number of protons determines an element's atomic number and is used to distinguish one element from another. Together, the number of protons and the number of neutrons determine an element's mass number.

8 0

2 years ago

Someone sprays perfume in another room. It can be smelled a few minutes later.

raketka [301]

D is the right answer

4 0

3 years ago

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How many orbitals are in the first energy level? A. 3 B.4 C.2 D.1

WINSTONCH [101]

Answer:

3 orbitals

Explanation:

3 0

3 years ago

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Calculate the frequency required to eject electrons from gold with a work function of 8.76 x 10-19 J

Savatey [412]

$hf=W+\frac{mv^{2}}{2}\\\\
f=\frac{W+\frac{mv^{2}}{2}}{h}\\\\\

W=8,76*10^{-19}J\\
m=9,11*10^{-31}kg\\
v=3*10^{8}\frac{m}{s}\\
h=6,63*10^{-34}Js\\\\\\
f=\frac{8,76*10^{-19}J+\frac{9,11*10^{-31}kg*(3*10^{8}\frac{m}{s})^{2}}{2}}{6,63*10^{-34}Js}=7,5*10^{19}Hz$

5 0

3 years ago