Which of the following is the electron configuration for an electrically neutral atom of beryllium (Be) ?

1s^2 2s^2

1s2^2s2^2p^6

1s^22s^22p^4

1s^22s^22p^44d^2

The formal procedure for taking equipment out of service and ensuring it cannot be operated until an unauthorized person has returned it to service is

A chemist requires 3.0 liters of 0.12 M H2SO4 solution. How many grams of H. SO4 should the chemist dissolve in the water?

A 11.0 kg iron weightlifting plate has a volume of 1400 cm3. What is the density of the iron plate in g/cm3?

Neutralization Reaction HNO3 + NaOH predict the products (so do double replacement reaction) and balance them

I'm working on a P1V1=P2V2 problem. I have all the information in and is has equaled 146.686235. Would I round this to 147 or 146.69 or neither?

List two non-SI units for volume, and explain how they relate to the cubic centimeter.

G which atomic orbitals overlap to form the carbon-carbon σ bonding molecular orbital of acetylene, c2h2?

Where did the earth hold most of its original water

Giovanni created this chart to study for an exam. A 2-column table titled common ionic compounds. The first column labeled compound has entries sodium hydroxide (N a O H), iron oxide (F e O), calcium chloride (C a C l subscript 2), calcium carbonate

Consider the two electron arrangements for neutral atoms A and B. What is the difference between atom A and atom B? A - 1s22s22p63s1 B - 1s22s22p65s1 Atom B has lost some inner electrons.