Electric field lines /Conductor/ Electroscope/ Insulator Elementary charge/ Electric field/ Charging by conduction/ Charging by induction/ Potential difference 1. Separation of charges in an object without touching it is.
2. The work done moving a positive test charge between two points in an electric field divided by the magnitude of the test charge is the electric .
3. An electric is a material through which charges move about easily. is giving a neutral object a charge by touching it with a charged object.
4. A material through which electrical charges does not move easily is an electrical .
5. The lines providing a picture of the size and strength of the field around a charged object are called the .
6. The property of the space around a charged object that exerts a force on other charged objects is the .
7. A device that helps determine charge using pieces of metal foil is a(n) .
8. The magnitude of the charge of an electron is the .

See explanation

Explanation:

1. Separation of charges in an object without touching it is (charging by induction).

2. The work done moving a positive test charge between two points in an electric field divided by the magnitude of the test charge is the electric (potential difference).

3. An electric (conductor) is a material through which charges move about easily. (Charging by conduction) is giving a neutral object a charge by touching it with a charged object.

4. A material through which electrical charges does not move easily is an electrical (insulator).

5. The lines providing a picture of the size and strength of the field around a charged object are called the (electric field lines).

6. The property of the space around a charged object that exerts a force on other charged objects is the (electric field).

7. A device that helps determine charge using pieces of metal foil is an (electroscope).

8. The magnitude of the charge of an electron is the (elementary charge)

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms