As the atoms of the elements in Group 1 of the Periodic Table are considered from top to bottom, the number of
valence electrons in the atoms of each successive element
a
Ob
decreases
increases
remains the same
Oc

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

Calculate the frequency of a wave in a spring toy. the wave has a speed of 1.1 meters per second and a wavelength of 0.1 meters. *

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]