Sodium (na) has an atomic number of 11 and an atomic mass of 23. which of the following correctly shows the electron arrangement for sodium?

2, 9 2, 8, 1 2, 8, 2 2, 9, 1

Which of the following are good traits of a hypothesis? it will be able to be testedit can predict an outcomeit will explain the observationsall of these

What are the two largest greenhouse gases

Read "who built the pyramids? ”. leave this link open while you answer the questions throughout the assignment. give at least two reasons why some people claim the pyramids of giza were constructed by aliens.