An element has an atomic number of 30. How many protons and electrons are in a neutral atom of the element?

A. 30 protons, 30 electrons

B. 15 protons, 15 electrons

C. 60 protons, 30 electrons

D. 30 protons, 0 electrons

How many moles of KBr will be produced from 10.51 moles of BaBr2? BaBr2 + K2SO4 → KBr + BaSO4 Select one: a. 21.0 b. 5.26 c. 17.9 d. 7.88

Water is an example of a

Which of the following statements best describes the current atomic theory

The table below gives the atomic mass and relative abundance values for the three isotopes of element M. Relative abundance (%) Atomic mass (amu) 78.99 23.9850 10.00 24.9858 11.01 25.9826 What is the average atomic mass (in amu) of element M? 2.86 5.

How many valence electrons does a nitrogen atom have?

Given 4.8 moles of a gas in a 1.8 L container, if the temperature is found to be 31 degrees Celsius, what is the pressure of the gas? (The ideal gas constant is 0.0821 L · atm/mol · K and 1 atm = 760 torr.) 6.79 torr 66.55 torr 6.79 x 100 atm 6.

Write this number to two significant figures in scientific notation. Use the "^" character to indicate the exponent. 4.253

AN atoms nucleus contains it's protons and electrons true or false

What is the difference between parent geometry and actual geometry

The volume of a gas is halved and the temperature is unchanged. The pressure of the gas is