Chemistry, 13.10.2020 01:01 iziyahh902
Please help me with these questions its only a few! (100 Points)
1) An atom has an average atomic mass of about 72.5 amu.
What is the chemical symbol for the atom?
Consult the periodic table.
Pb
Eu
Ge
U
2) Atom A emits mainly X-rays when excited. Atom B emits primarily ultraviolet radiation when excited.
What can be said about the transition between energy levels for Atom B?
Consult the electromagnetic spectrum.
There is no correlation between the distance between energy levels and the energy emitted.
The change between energy levels for atom B is less than for atom A.
There is no difference between the distances electrons in atom A and atom B must travel.
The change between energy levels for atom B is greater than for atom A.
3) What is the photoelectric effect?
The photoelectric effect changes with the emission of an atomic spectrum.
The photoelectric effect is the number of electrons in the shells around a nucleus.
The photoelectric effect is due to the release of electrons from an atom.
4) What information can the atomic emission spectra of a distant star yield for scientists?
age of the star
orbit of the star
elements found within the star
composition of nearby planets
5) Phosphorus has an atomic number of 15.
What is the electron configuration for an electronically neutral atom of phosphorus?
Use an aufbau diagram and fill it in if you need to.
1s22s22p63s23p6
1s22s22p63s23p3
1s22s22p63s23p5
1s22s22p63s23p4
Answers: 1
Chemistry, 21.06.2019 22:30, erikloza12pdidtx
Which type of bond is present in hydrogen sulfide (h2s)? the table of electronegativities is given. a. hydrogen b. ionic c. nonpolar covalent d. polar covalent
Answers: 1
Chemistry, 22.06.2019 10:10, alvaradolm6853
What shape would a molecule with two bound groups and two lone pairs have?
Answers: 1
Chemistry, 22.06.2019 12:40, whitethunder05
When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign
Answers: 2
Please help me with these questions its only a few! (100 Points)
1) An atom has an average atomic m...
Mathematics, 02.09.2021 19:10
Mathematics, 02.09.2021 19:10
Mathematics, 02.09.2021 19:10
Mathematics, 02.09.2021 19:10
Biology, 02.09.2021 19:10
Mathematics, 02.09.2021 19:10
English, 02.09.2021 19:10