Quiz1 Chem

Discovered the neutron. revealing the structure of the atomic nucleus

Identify the number of significant figures in the given number.

0.00215

Convert and write your answer in 3 significant figures.

12.54 dam to _________ mm

Convert and write your answer in 3 significant figures.

1 lb to _______ cup

Simplify your answer in 3 significant numbers

( 8.2 × 10⁶ ) × ( 1.5 × 10^-3 ) × ( 1.9 × 10^-7 )

Determine the level of accuracy and precision.

A refrigerator thermometer is read ten times and registers degrees Celsius as: 39.1, 39.4, 39.1, 39.2, 39.1, 39.2, 39.1, 39.1, 39.4, and 39.1. However, the real temperature inside the refrigerator is 37 degrees C.

Element if the no. of protons is 12?

What is the number of neutrons of Strontium?

What is the number of neutrons of Cl-37?

The element Bromine has two isotopes, Br-79 and Br-81. The abundance of these isotopes both occur naturally at 50%. Calculate the relative atomic mass for Bromine.