Please hurry this is due tomorrow morning

The periodic table is organized into groups and periods of elements. The characteristics of a certain group of elements are listed below.

Characteristics of a Group of Elements
• Is shiny
• Is solid at room temperature
• Has atoms with two valence electrons

Which of these elements is in this group?
F Lithium
G Strontium
H Aluminum
J Silicon

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth

How many grams of sodium chloride are in 250ml of a 2.5m naci solution