There are 18 periods in the periodic table. Which answer choice rewords the false statement so it is true?

2. Which is the correct element for the atom with 42 protons and 49 neutrons?

Would your results be he same if 1.5 g of barium chloride was used instead of 1.3 g? same with 0.7 g of barium chloride?

What makes the black surface of a playground get warmer on a sunny day than on a cloudy day? A) The sunlight heats up the playground. B) More children play outside when it is sunny. C) Clouds absorb all of the heat from the playground.

What volume of chlorine gas at 45.3oC is needed to react with 14.2g of sodium to form NaCl at 1.72atm?

16. A body is a particular amount of matter. It can be a solid, liquid or gas. It can be described as existing in 999 O A. motion and force. O B. location and movement. OC. size and shape. O D. time and space. Correct answer is c size and shape

What is the product? 3•[1 - 4 5 - 7] [3 - 12 15 - 21] [4 - 1 8 - 4] [3 12 15 21] [4 - 12 8 - 21]

A hormone is an organ that secretes chemical substances into the bloodstream.

Complete and balance the equation for the combustion of zns in excess oxygen? zns + ? o2→? zno + ? use no fractional coefficients. the number of moles and the formula of the product containing s are

What is the relationship between the units of measurement for the volume of a liquid and of a solid object?

1. Which of the following elements is a transition metal?