The atomic number of sodium (Na) is 11. Which of the following is the correct electron configuration for this neutral atom?

Question 1 options:

1s22s22p63s1

1s22s22p6

1s12s12p63s3

1s22s23s24s2

Which particle changes the mass of the isotope the most? which particle changes the mass of the isotope the most? electron capture positron emission gamma capture alpha particle neutron particle?

MgO (s) + H2O (l) → Mg (OH) 2 (aq)

A reaction XY occurs in a closed vessel. when it reaches equilibrium at temperature T, the number of molecules changing from X to Y is equal to the number of molecules changing from Y to X true or false.

What happens when elements chemically combine? A.) All elements retain their original properties B.) New properties are former C.) Only metals retain their original properties D.) New elements are formed

Which scenario would result in a positive population growth? Use this formula: population growth = (birth rate + immigration) - (death rate + emigration) A) 30 individuals emigrate, 30 individuals die, 30 individuals are born, 0 individuals

How many metaloides are found on the periodic table

Which of the following is considered to be a chemical property of matter?

How does percent composition by mass contribute to writing a balanced equation?

Raising the temperature of a reacting system increases the rate of the reaction, but does NOT increase the a) activation energy b) number of collisions c) fraction of the reacting particles which possess energies greater than the activation energy

If you have 60 grams of MgCl2 in 5 liters of solution, what is the molarity of this solution?