Determine the number of significant figures in each measurement.

12.90 s

1. Which statement describes the charge and location of an electron in an atom? A) An electron has a positive charge and is located outside the nucleus. B) An electron has a positive charge and is located in the nucleus.

Atomic Theory is A - subject to change if new information is discovered. B - a solution to the problem of differing isotopes. C - Unchangeable D - a descriptive table that lists all of the elements.

Which type of bonding involves a lattice of positive ions surrounded by a cloud of delocalized electrons? A. ionic bonding B. metallic bonding C. covalent bonding D. hydrogen bonding

How do i complete and balance the reaction hc2h3o2+ba (oh) 2

Which of the following is an example of a liquid and gas mixture? * rubbing alcohol and water air carbonated water ocean water

The electron configuration 1s22s22p63s23p6 represents which noble gas?

What feature distinguishes a neutral atom from an ion

What is urine made of?

How many grams of F - must be added to a cylindrical water reservoir having a diameter of 2.02 * 102 m and a depth of 87.32 m?

How do you know when it's the same element?