The decay of which radioisotope can be used to estimate the age of the fossilized remains of an insect?

(1) Rn-222 (3) Co-60

(2) I-131 (4) C-14

How are the elements arranged on the periodic table

0.836 m 0.525m - > If the pressure exerted by the wind on the kite shown above is 113 Pa, what is the force exerted on the kite in N? LN

Explain why the chemical formula for calcium hydroxide, Ca (OH) 2 is not written as CaO2H2

The number of valence electrons found in an atom of a group a element is equal to

For the chemical reaction H2 + CO2 → H2O + CO, the energy contained in the reactants is 394 kJ, and the energy contained in the products is 352 kJ, assuming 1 mol of each substance is present. Which of the following statements is true? A.

Write the mathematical expression that allows you to solve for the oh - concentration in water when you know only the h3o + concentration.

The role gravity played in the formation of the sun?

What kind of reaction occurs when you mix aqueous solutions of barium sulfide and sulfuric acid?

What is true about empathy? Most anyone can learn this skill. Not everyone can learn this skill. It is a desirable attribute. choices A and C

What effect can new observations have on a scientific theory