Chemistry, 29.09.2020 03:01 daisyperez1
3. Which statement about an atom is true:
A. All the elements have only one nucleon (mass) number.
B. The nucleon number can be less than the proton number.
C. The nucleon number can be equal to the proton number.
D. The number of neutrons never equals the number of electrons.
4. An element X has two isotopes, which may be represented by 238X and 235X. How does 238X
differ from 235X/
A. It has 3 more protons and 3 more electrons.
B. It has 3 more protons, but no more electrons.
C. It has 3 more neutrons and 3 more electrons.
D. It has 3 more neutrons, but no more electrons.
Answers: 1
Chemistry, 22.06.2019 01:30
What is the value of keq for the reaction expressed in scientific notation
Answers: 1
Chemistry, 22.06.2019 16:10
Given the following equation: 2a1 + 3mgcl2 --> 2alcl3 + 3mg how many moles of aluminum chloride are produced from 2.5 moles of magnesium chloride?
Answers: 1
Chemistry, 22.06.2019 22:00
In order to complete this lab. you will need to be familiar with some common chemistry terms. complete the chemical change puzzle and list the relevant terms and their meaning below a.rectant b.product c.supernate
Answers: 3
Chemistry, 23.06.2019 00:00
What is the empirical formula of a compound that is 50.7% antimony and 49.3% selenium ?
Answers: 2
3. Which statement about an atom is true:
A. All the elements have only one nucleon (mass) number.<...
Physics, 29.06.2019 22:30
Biology, 29.06.2019 22:30
Social Studies, 29.06.2019 22:30
Physics, 29.06.2019 22:30
Mathematics, 29.06.2019 22:30
Mathematics, 29.06.2019 22:30
Mathematics, 29.06.2019 22:30
Biology, 29.06.2019 22:30