Which of the following electron configurations for neutral atoms is correct?

helium: 1s1, 1p1

nitrogen: 1s2, 2s2, 2p3

silicon: 1s2, 2s2, 3s2, 2p63p2

the third sub-level

Li

Mt. Everest is 29,028 feet high. How many miles is this?

Which of the following is an element? a. salt b. iron c. nylon d. sand

If we decrease the distance an object moves we will

The energy necessary to enable a reaction to occur is called the activation energy.

When designing an experiment, why is it important to test only one variable?

Do you think an observer on another planet in the solar system might see eclipses

A. A vector is any element of a vector space. Is this statement true or false? A. True by the definition of a vector space B. False; not all vectors are elements of a vector space. C. False; a vector space is any element of a vector.

19 Which gas is the most abundant greenhouse gas? A. ozone B. chlorofluorocarbon C. carbon dioxide OD. methane E. water vapor Reset Next

The plates of a parallel-plate capacitor are maintained with a constant voltage by a battery as they are pushed together, without touching. How is the amount of charge on the plates affected during this process? a.

Which of the following creates a longitudinal wave? A. striking a gong B. turning on a flashlight C. shaking a rope up and down D. dropping a stone into a pond