Hun arbeider på laboratoriet.

Because Norwegian often marks definiteness by adding an ending to the noun instead of using a separate word like the.

• et laboratorium = a laboratory
• laboratoriet = the laboratory

So in this sentence, på laboratoriet means at the laboratory.

Both på and i can sometimes be translated as in or at, but they are used differently in Norwegian.

In this sentence, på laboratoriet usually means at the laboratory as a workplace or location in a general sense. This is very natural when talking about where someone works.

• Hun arbeider på laboratoriet. = She works at the laboratory.

If you say i laboratoriet, it sounds more like inside the laboratory room/building physically.

So:

• på laboratoriet = at the lab, as a place of work
• i laboratoriet = in the lab, physically inside it

Arbeider is the present tense of å arbeide, which means to work.

• å arbeide = to work
• arbeider = work / works / am working / is working, depending on context

It is perfectly correct, but in everyday spoken Norwegian, jobber from å jobbe is often more common.

So these are both natural:

• Hun arbeider på laboratoriet.
• Hun jobber på laboratoriet.

The first can sound a little more formal or written.

Because Norwegian present tense usually covers both the simple present and the present continuous.

So arbeider can mean:

• works
• is working

The exact meaning depends on context.

That means Hun arbeider på laboratoriet could mean either:

• She works at the laboratory
• She is working at the laboratory

This is the normal Norwegian main clause word order:

subject + verb + other information

So:

• Hun = subject
• arbeider = verb
• på laboratoriet = place expression

This is similar to basic English word order:

• She works at the laboratory

In this sentence, hun means she because it is the subject.

Norwegian distinguishes between subject and object forms:

• hun = she
• henne = her

Examples:

• Hun arbeider på laboratoriet. = She works at the laboratory.
• Jeg ser henne. = I see her.

You know because its indefinite article is et:

• et laboratorium = a laboratory

Neuter nouns usually take -et in the definite singular:

• et laboratorium → laboratoriet

So the sentence also helps you recognize the gender of the noun.

No. Arbeider is the present tense form.

The infinitive is:

• å arbeide = to work

A quick comparison:

• å arbeide = to work
• arbeider = work/works
• arbeidet = worked / has worked, depending on context

It can be either, depending on context.

Norwegian present tense is flexible, so the sentence may mean:

• She works at the laboratory. → general fact / job
• She is working at the laboratory. → current activity or temporary situation

If there is no extra context, many people will understand it as a general statement about where she works.

Yes, absolutely. That is very common and natural.

• Hun arbeider på laboratoriet = slightly more formal or neutral/written
• Hun jobber på laboratoriet = very common in everyday speech

Both are correct.

A careful approximation is:

lah-boh-rah-TOH-ree-et

A few useful points:

• the stress is typically on to
• the final -et is pronounced, but often lightly
• Norwegian r sounds may vary by dialect

If you want to sound natural, it is better to learn the whole phrase rhythmically:

Hun arbeider på laboratoriet.

Because in Norwegian, the definite article is usually attached to the end of the noun.

Compare:

• et laboratorium = a laboratory
• laboratoriet = the laboratory

This is one of the big differences from English. Instead of the laboratory, Norwegian often uses just one word: laboratoriet.

Sometimes, yes. Translation depends on context.

A very direct English translation might be:

• She works at the laboratory.

But in some situations, English might also say:

• She works in the laboratory.

Norwegian på laboratoriet often focuses on the lab as a workplace or institution, while English may choose at or in depending on style and context.