How is beryllium (Be) similar to calcium (Ca) ?

A. Both are rare metals.

B. Both react readily with elements in Group 1.

C. Both are very reactive.

D. Both rarely combine with other elements.

Use the periodic table to give the name and symbol for each of the following elements: (a) the halogen in the same period as the alkali metal with 11 protons (b) the alkaline earth metal in the same period with the neutral noble gas with 18

What intramolecular bonds does H2 have

9) 9.010 x 10-6 How many significant numbers are there?

Light is traveling through the different media shown. In which medium does light travel fastest? A. sky B. dimond C. space D. water

Achange in which factor will affect the rate of reaction only when gases are involved? temperature pressure surface area concentration

What do scientists do during data collection? O A. Analyze information to form a summary B. Gather information during an experiment C. Observe and ask scientific questions O D. Design an experiment to test a hypothesis

Organic molecules always: A. contain carbon. B. contain carbon, hydrogen, and oxygen respectively in a 1:2:1 ratio. C. are produced by living organisms. D. dissolve in water.

Whats the scientific notation of 0.00000923

A catalyst increases the rate of a chemical reaction by

What energy is changed to cell energy in stage 1 of photosynthesis. true or false