what element has 3 protons, 2 electrons, and 3 neutrons and what is its symbol?

What is the diameter of the silver cylinder in the photo ?

1.2. The ground state electronic configuration of a neon atom is 1s²2s² 2p°. How many of these electrons have magnetic quantum number m = 0? A) 2 B) 4 C) 6 D) 8 E) 10

Solve

The nucleus of an iron atom has a radius of 4x10-15 m and contains 26 protons. What repulsive electrostatic force acts between two protons in such a nucleus?

Consider the gold isotope 197Au.a. How many electrons, protons, and neutrons are in a neutral 197Au atom?b. The gold nucleus has a diameter of 14.0 fm. What is the density of matter in a gold nucleus?c. The density of gold is 19,300 kg/m3. How many times the density of gold is your answer to part b?

Molybdenum has an atomic radius of 0.145 nm. The volume of its cubic unit cell is 0.0375 nm3 . What is the geometry of the molybdenum unit cell

Part 1 Find the speed an alpha particle requires to come within 4 x 10-14 m of a gold nucleus. Coulomb's constant is 8.99 x 109 Nm2/C2, the charge on an electron is 1.6 × 10-19 C, and the mass of the alpha particle is 6.64 x 10-27 kg. Answer in units of m/s. Part 2 Find the energy of the alpha particle. Answer in units of MeV.

There is one part to this question. I need to know the nm. Thank you!

Identify the following objects as being either ... a. positive b. negative c. neutral If there is no conclusive evidence, then select all that could be true. Description of Object a, b, or c? i. An object possesses more protons than electrons.   ii. An object possesses more neutrons than electrons.   iii. A formerly neutral object that just lost some electrons.   iv. A formerly neutral object that just gained some electrons.   v. An object which attracts a negatively-charged balloon.   vi. An object which attracts neutral paper bits and attracts a negatively-charged balloon.   vii. An object which attracts neutral attracts paper bits and repels a negatively-charged balloon.   viii. An object which attracts a negatively-charged balloon and attracts a positively-charged balloon.   ix. An object which attracts a charged balloon (balloon A) which is attracted to a negatively-charged balloon (balloon B).   x. An object which attracts a…