Question

closure - exit ticket september 14/15, 2023 do you know the composition of an element? elements symbol: blank atomic # blank atomic mass blank # of protons blank # of electrons blank # of neutrons blank # of valence electrons blank

Explanation:

Step1: Identify element symbol

The element symbol is U for uranium.

Step2: Determine atomic number

Uranium has an atomic number of 92.

Step3: Find atomic mass

The atomic mass of uranium (most common isotope U - 238) is approximately 238.03.

Step4: Calculate number of protons

The number of protons is equal to the atomic number, so 92.

Step5: Calculate number of electrons

In a neutral atom, the number of electrons equals the number of protons, so 92.

Step6: Calculate number of neutrons

Number of neutrons = Atomic mass - Atomic number. For U - 238, 238 - 92=146.

Step7: Determine valence electrons

Uranium is in the actinide series. Its electron configuration is [Rn] 5f³6d¹7s², and the number of valence electrons is 6.

Answer:

Element's symbol: U
Atomic # : 92
Atomic Mass: 238.03

of Protons: 92

of Electrons: 92

of Neutrons: 146

of Valence electrons: 6