Are atoms mostly empty space

Part A loaf of bread bakes in an oven. The bread is on a rack about one foot above the heat source. However, the top of the bread cooks just as fast as the bottom. How is heat being added to the bread?

Which is true about each element in a period or horizontal row of the periodic table? Each element has one more outer shell than the element before it. Each element bonds with the element before it.

An atomic physicist determines that an atom is composed of 8 positively charged particles and has a mass of 15 amu. Which is the best conclusion that can be drawn? The atom has 7 neutrons and 8 protons. The atom has 7 electrons and 8 protons.

Which of the following utilizes the measurement of a short - or long-lived radioactive element, with its decay product, to determine the absolute age of an object? A. varves B. radiometric dating C. dendrochronology

Which of the following forms a covalent bond with nitrogen? A. lithium (Li) B. calcium (Ca) C. carbon (C) D. argon (Ar)

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda