Which one of the following elements will combine with chlorine in a 12 ratio to give a formula of XCI2.?

Na

AL

Mg

F

c

Which type of decay has the greatest mass?

What is released in the process of an atom moving from an excited level to a lower energy level?

Planets that are larger in diameter, farther from the sun, and less dense then smaller planets in the solar system are known as

What is formed when amino acids form long chains or polymerize

What is the Full Form of PET?

How many of the following elements have 2 unpaired electrons in the ground state? C Te Hf Si A) 1. B) 2. C) 3. D) 4.

Which has a higher frequency, a neutron or electron? Why?

1) Identify the intensive properties of a sample of matter: A. mass B. hardness C. color D. volume E. reflectivity

Suppose you have a buffer containing 0.400 M hydrazine and 0.300 M hydrazinium chloride at equilibrium. Then you add 25.2 g of NaOH to 2.0 L of the buffer. What change in pH is caused by the addition of the base? A) 0.99 B) 0.40 C) 8.71 D) - 0.36

The heart is an example of which level of organization within an organism? O cell organ tissue organ system O O