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

1a) consider the mixed aldol condensation reaction of 1-methylcyclopentane-1-carbaldehyde (shown below) and 3,3-dimethyl-2-butanone (shown below) in the presence of sodium hydroxide.

Which best describes a compound such as magnesium oxide? an impure substance that is made up of two elements a mixture of two uncommon substances a mixture of two common elements a pure substance that is made up of different elements

How are problems best solved by scientists? One talented scientist develops the solution alone. Scientists with similar backgrounds, but different areas of expertise, contribute to the solution.

Is the darkest part of the moon's shadow is called the penumbra.

If there are two beakers of water 1 containing 500ml and the other 100ml both at 20 degrees Celsius which has more thermal energy and why?

18. which bond is most polar? H--F H--Cl H--Br H--I

What kind of reaction is ca (s) + h3po4 (aq) ca3 (po4) 2 (s) + h2 (g)

In the teapot dome scandal, what did the secretary of the interior albert fall lease

A Material made of equal parts is called what? A. Atom, B. Pure substance, C. Mixture

Part C Why are dichotomous keys useful in classifying a new species?