An element with the atomic number of 13 and mass number of 27 has how many neutrons?

Which is an advantage if sexual reproduction over asexuals reproduction A. Increased number of organisms and decreased genetic variation B. Increased genetic variation C. Doesn't require an organism to find a mate D. Decreased genetic variation E.

Which of the following statements is true? An element is made of only one type of atom. Positively charged atoms have gained protons. A molecule must be made of two or more elements. Electrons and neutrons are found in the nucleus of an atom.

6. Which is a characteristic of a mixture?

Which nuclear decay emission has the weakest penetrating power? 1. alpha particle 2. bera particle 3. gamma radiation 4. positron

Why did bohrs observations of gaseous elements not reveal a complete spectrum when the light was shone through a prism? explain

What is the percent composition of sulfur compound that contains 20.8 g carbon and 54.4 g sulfur?

Which of the following is an example of heat transfer by conduction? A. The upstairs of a house being warmer than the downstairs B. Burning your finger on a hot match C. The sun warming your skin D. Being warmed by a fire on a cold night

How much did John save in his 401 (k) in the 2014 tax year?

Explain why the chemical released from the injured fish may not cause in a wa why the chemical released from the injured fish may not cause in alarm response in other fish species

hat historical figure was responsible for developing the system for categorizing living things that is still used today? A) Sir Isaac Newton B) Carolus Linnaeus C) Benjamin Franklin D) Galileo